trek supercaliber vs specialized epic

Trek Supercaliber SLR Vs Specialized Epic World Cup: Which is the ultimate cross-country speed machine?

• Guy Kesteven
• November 27, 2023

Specialized and Trek have both debuted new short travel suspension XC race rigs this year. And given that the Trek Supercaliber and Specialized Epic World Cup look extremely similar in design, we figured they would make the perfect XC head-to-head test.

Trek Vs Specialized Credit: Mick Kirkman

Trek and Specialized are giants in the mountain bike world, and both of these new XC bikes weigh in under 10kg and have five figure price tags. And that’s not all they have in common. Dynamic geometry and component choice of the Trek Supercaliber SLR 9.9 XX AXS Gen 2 and Specialized S-Works Epic World Cup are closely matched too. They feel surprisingly different on the trail though. So what are the details that affect the dynamic performance, and which one – if either – should you pick for ultimate cross-country speed? That’s the question this head-to-head test will answer.

• Read the full review of the Specialized S-Works Epic World Cup
• Read the full review of the Trek Supercaliber SLR 9.9 XX AXS Gen 2

Now, if you’ve not been following World Cup XC racing recently, you will have missed out on some excellent competition from insanely skilled and fit athletes. You also won’t know that most courses now feature sections that you’d assume were designed for 16kg, sticky tyre enduro bikes, not sub 10kg, semi-slick tyre-shod whippets. It’s why the best XC race bikes now look like lightened versions of trail bikes, with conventional linkage-driven shocks giving 100-120mm of travel. And both Trek (Top Fuel) and Specialized (Epic Evo) have bikes in that category too.

Suspension and frame layout

Trek and Specialized both used integrated shock designs to boost stiffness and give a hardtail look

That’s not what we’re looking at here, however. Both the Supercaliber SLR 9.9 XX AXS Gen 2 (£10,800) and Specialized S-Works Epic World Cup ($11,000) use a proprietary top tube embedded shock giving 80mm and 75mm of travel respectively. This gives them a traditional hardtail-style frame layout, rather than a distinctly separate front triangle and swingarm. Where the increased triangulation and more firmly anchored shocks open up potential for greater stiffness without adding extra weight. Both brands trade on that too, claiming hardtail-style power delivery, but with suspension when you need it. And it’s true, both the Trek and Specialized feel stiffer than conventional XC full-suspension bikes. But for different reasons. On the Trek Supercaliber it’s a structural thing, while the Specialized Epic WC creates the illusion of stiffness with its suspension set up.

Specialized’s Brain equipped RockShox SID fork is marginally heavier than the stock SID

Thankfully things are a lot simpler up front, where the latest RockShox SID SL Ultralight 110mm travel fork is hardwired to the same TwistLoc two position remote as the rear shock on the Trek. Specialized has transferred its long running Brain inertia valve to the latest 110mm travel SID SL fork. This reactive lockout has preset ‘Brian fade’ sensitivity, using a preloaded spring on the inertia valve. There’s no handlebar remote, but you can reach down and move the ‘fade’ lever on-the-fly with your hand if the trail is smooth enough. The latest version has had the spike valve removed for a more open feel, and even when ‘locked out’ you still get 15mm of cushion for traction. All-in, the Brian system adds 183g over the standard SID fork.

Left: Trek has a twist grip remote for the fork and Shock. Right: Specialized relies on smart suspension tech

On the scales

Claimed frame weights are different for both bikes. Specialized suggests a near 250g advantage over the Trek, but the sub 10kg build weights for each bike are very close when we checked them in the workshop. The Trek weighs 9.72kg (21.43lb), the Specialized a smidge heavier at 9.75kg (21.5lb). And that’s because the Epic WC has a heavier Brain version of RockShox’s SID SL fork and a power meter chainset too. That said, both add less to the overall weight of the Specialized than the Fox Transfer SL dropper does on the Trek. Yup that’s right,  Specialized fits a rigid post. All of which suggests that the claimed weights are a little off. 

Geometry side-by-side

If you take a quick glance at the geometry chart, the head angle on the Specialized is a lot slacker than the Trek. But the static geometry does not tell the whole story. The Specialized is designed to run very little shock sag, so the dynamic head angle with the rider on board is actually very close to the Trek. And it’s a similar story with the BB heights. The Trek appears to be a lot higher, but once you factor in the increased shock sag, it’s pretty close to the Specialized. On the trail then, the dynamic geometry of both bikes is much closer than it appears in the chart below (using our own measurements, not the manufacturers claimed figures).  

Trek’s top end Supercaliber has Level Ultimate 4-piston brakes, a XX AXS drivetrain and a one-piece Bontrager cockpit

As the model name suggests, there’s a full SRAM XX AXS drivetrain on the Trek, complete with carbon rear derailleur cage and hollow carbon crankarms. While the new XX transmission isn’t as fast to shift as older AXS systems, you don’t have to ease up on effort while changing, so everything is literally geared towards going faster. Unlike the Specialized Epic WC, there’s no power meter chainset here though. Bontrager’s top Race Series Limited kit provides the one piece bar/stem (750/80mm equivalent) and the carbon rail saddle. The ultralight (but lifetime warrantied) carbon Kovee wheels have a 108 point engagement rear hub, which joins in the fast and furious fun with near immediate reaction to pedal inputs.

Specialized’s Epic WC gets less powerful 2-piston brakes

It’s a similar blend of parts on the Specialized. The t ransmission is SRAM’s top line XX SL AXS wireless kit including a full Quarq power meter on the narrow stance 168mm Q-Factor chainset. Specialized’s partner-brand Roval provides the Control SL Integrated cockpit, which mimics a 760mm bar in a 70mm stem, and the superlight Control SL wheels. Our only gripe with the build is that the two-piston SRAM Level Ultimate brakes are both less powerful and 10g heavier than the four-piston versions. Lever feel is great though, and you get a 180mm front rotor for power compensation.

Performance

We struggled to get to grips with the suspension on the Specialized Epic WC

We literally spent months setting and re-setting sag levels, tweaking the compression and rebound damping on the Specialized Epic World Cup, and riding it in as many different situations as possible. In the process we figured out that there are some things the Epic WC does very well. The ‘take no prisoners’ vibe is a psychological gift for flat-out attacks. The split personality suspension works very well in firmer modes when powering from smooth surfaces to stutter bumps (or vice versa). Fixed seat post aside, the spec is pretty much perfect premium race gear, and its clean looks were universally praised. 

For an XC bike, the Specialized Epic WC isn’t as firm under foot as we expected

Now for the negatives. The topped out, sat ‘on’ not ‘connected to’ the trail suspension response undermines control and traction significantly on descents, and you get tired really quickly on technical trails. The (relatively) soggy pedalling action also saps energy and morale, and being unable to change that feeling when riding inevitably means compromise, rather than customised, performance for each section of track too. 

Once the shock bushing loosened up, the Trek Supercaliber took off like a rocket

Contrast that with the Trek Supercaliber. Sure it took a couple of rides for the ZEB bushing on the IsoStrut shock to free up, and the skinny Bontrager tyres needed switching out too, but the Supercaliber just felt ‘right’ from the start, especially from a race point of view.  The combination of the structural stiffness and the very positive pedalling feel from the higher-than-average anti-squat, and extra low speed compression damping, gives a noticeably different character to most conventional XC bikes. And even though the suspension response is firm, the fact it’s progressive makes it more predictable than the reversed stiff-to-soft action of the Specialized. 

The Gen 2 Trek Supercaliber is born for speed

There’s none of the harsh, hammering topped-out staccato of the Epic World Cup either, and the standard SID SL fork is a lot less spikey than Specialized’s Brain equipped unit. As a result, fatigue levels were dramatically reduced, even on rougher descents when testing the bikes back-to-back. In fact, the only time the Trek felt at a disadvantage to the Epic World Cup was on smooth climbs, where the increased sag felt less efficient than the topped out Epic. That’s immediately remedied with a twist of the lockout though, and overall the Trek Supercaliber just felt a lot more sorted, connected and intuitive for racing and flat out XC/Trail riding.

And the clear winner here is the Trek Supercaliber SLR 9.9 XX AXS Gen 2

Having said that, neither bike is as fast on descents/technical sections as most longer-travel XC bikes, and therefore they aren’t as versatile either. They don’t offer any weight advantage either, and with a remote multi-mode suspension, rather than binary lockouts, most 120mm bikes are faster on a lot of climbs and more tuneable for different sections of track. 

So if there’s no real weight advantage, and both bikes have less travel for bigger hits and the extra complications of proprietary shocks, why would you want to consider either of them over a conventional full-suspension race bike? The answer potentially lies in their very different ride vibes. You can read the full test of the Trek Supercaliber SLR 9.9 XX AXS Gen 2 here and the Specialized S-Works Epic World Cup here . 

Also we’re already seeing both the Supercaliber and Specialized’s Epic Evo using RockShox Flight Attendant electronic suspension adjustment on the World Cup race circuit too. That makes investing £10k in a proprietary suspension system and frame potentially less appetising when Ai might be end up doing a better job on a more versatile frame in the not-too-distant future.

Test Winner’s Stablemates – alternatives for different budgets 

SRAM or Shimano? You get to choose as Trek also has the Supercaliber SLR 9.9 XTR Gen 2

Trek Supercaliber SLR 9.9 XTR Gen 2 £10,350

Sit squarely in the blue Shimano camp but want all the benefits of the Gen 2 Supercaliber SLR 9.9 frame? Well Trek also has a full Shimano XTR equipped bike. It gets a Fox 34 Step-Cast fork with 110mm travel paired with the IsoStrut, RockShox SIDLuxe shock and a twin lock out remote. You also get higher volume 2.4in tyres for more traction and control. Bonus. 

Trek’s Supercaliber SL 9.6 Gen 2 has all the latest XC tech, without the sky-high pricing

Trek Supercaliber SL 9.6 Gen 2 £3,780

XC race full suspension bikes are usually prohibitively expensive, not the Supercaliber SL 9.6 Gen 2. It shares the same frame layout and suspension tech as our test winner, but uses a heavier OCLV carbon lay-up and a RockShox Recon Gold RL fork to reduce costs and achieve a more competitive price point. You also get a 12-speed Shimano SLX drivetrain and a dropper post, so it’s ready to rock and roll.

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Trek Supercaliber Review — Podium-Winning XC Race Bike

Maddie Munro showing off her skills on a Trek Supercaliber.

The Trek Supercaliber is an XC race bike designed to bridge the gap between hardtails and full-suspension MTBs.

The Supercaliber utilizes innovative Trek Bikes’ IsoStrut suspension technology and industry-leading components to maximize performance and gain an advantage over the competition.

Snappy XC geometry, fast-rolling tires, premium carbon fiber, and low-travel suspension make this bike lightning fast and efficient.

With seven builds in the series, XC riders with big ambitions can choose the Supercaliber that fits their needs and budget. 

This Trek Supercaliber review will outline the series’ standout characteristics, discuss each model in detail, and finish with our verdict on who should choose this bike. 

A race-ready cross-country mountain bike designed for speed and efficiency.

• Exceptionally efficient
• Agile and snappy handling
• Ultra-lightweight for a full-suspension bike
• Plenty of small bump sensitivity
• No dropper post
• Narrow handlebars

Main Trek Supercaliber Specs

• Frame: Carbon OCLV
• Wheel size: 29″
• Tires: 2.2″
• Front travel: 100mm (120mm compatibility)
• Rear travel: 60mm 
• Drivetrain:  12-speed
• Brake rotors: 180mm (f), 160mm (r)
• Weight: 21.6 – 27lbs

Trek Supercaliber Overview

The Trek Supercaliber is a specialist cross-country bike for riders who want to maximize speed and climbing efficiency. This bike will help you break all your personal bests on your local XC trail but won’t provide much comfort on rough terrain with its narrow tires, rigid seatpost, and 60mm of rear suspension. 

Carbon OCLV Frame

Trek’s frames are renowned for their innovative design features and world-class ride characteristics fit for champions. Each Supercaliber uses the same patented OCLV Mountain carbon frame.

Trek utilizes techniques borrowed from the aerospace industry to deliver one of the world’s strongest and most durable carbon bike frames , even after impact. 

The Supercaliber has a Straight Shot down tube to enhance the responsiveness of the frame and reduce weight. Another unique feature is the Knock Block headset design that prevents the fork crown and handlebars from spinning too far in a fall, which often damages the frame. 

Trek also designed the Supercaliber frame with enough space to carry two water bottles, a non-negotiable for demanding XC racing. Finally, Trek backs each frame with a limited lifetime warranty. 

XC Geometry 

The Trek Supercaliber geometry plays a big role in its ride characteristics. Its straightforward, compact design delivers a sharp and efficient ride quality . 

Trek Supercaliber has a straightforward, modern and compact geometry with a Straight Shot downtube that reduces weight and improves handling.

It has a steep 69-degree head angle and a relatively slack seat angle of 74 degrees. A short stem (70mm), a tight rear center of 430mm, and a compact wheelbase of 1079 to 1172mm keep the Supercaliber as agile as possible. 

This geometry means the Supercaliber can change direction quickly and with minimal effort, allowing easy navigation of tight switchbacks and picking the fastest line. The low bottom bracket drop of 53mm also helps balance the sharp steering with extra stability. 

Trek IsoStrut Suspension

Trek’s IsoStrut frame-integrated rear suspension is a bespoke system designed in partnership with Fox. The Supercaliber comes with a Float Factory or Float Performance shock integrated into the IsoStrut, depending on the build. 

Trek’s IsoStrut technology provides the Supercaliber with firm and precise suspension that help the bike thrive on XC race tracks.

Each Supercaliber has just 60mm of rear travel, which aligns with Trek’s minimalist thinking. The IsoStrut is a structural element of the bike , eliminating the need for extra parts and unnecessary weight. The shock is enclosed in a stanchion that protects it from damage and reduces lateral frame flex. 

The IsoStrut contributes to a more efficient, durable, and sleek bike. In addition, by utilizing the remote lockout, you essentially turn the Supercaliber into a hardtail. 

You can tune the spring rate and adjust the rebound as you would on a standard shock. The only downside is that it requires more effort to maintain as you must disassemble the bike to service it.

Trek Supercaliber Builds

There are four models available in 2023. The new 9.6 and 9.7 Trek Supercaliber 2023 builds and the 2023 versions of the 9.9 and 9.8. 

All four models have a carbon fiber frame and components from leading manufacturers like Shimano, SRAM, Maxxis, Fox, RockShox, and Trek’s Bontrager. The Trek Supercaliber price varies from mid-range to elite-level. 

Trek Supercaliber 9.6 2023

MRSP: $4,300

The Trek Supercaliber 2023 9.6 is the most affordable model. Of course, this version isn’t cheap but gives ambitious cross-country racers a more achievable price. 

The 9.6 comes with the same premium OCLV Carbon frame and IsoStrut suspension as the top models. However, it has a Fox Float Performance DPS shock paired with a RockShox Recon Gold RL fork.

This version is the only one with alloy wheels; Bontrager’s Comp 23s. These come wrapped in XR2 Team Issue tires. The rest of the build kit on the Supercaliber 9.6 is aluminum alloy, excluding the steel-rail Bontrager Arvada saddle. 

Finally, this build has a Shimano Deore/SLX groupset with a 10-51t cassette and MT4100 brakes. 

Trek Supercaliber 9.7 2023

MRSP: $5,100

The Trek Supercaliber 9.7 is another 2023 edition of the bike. It’s built with mid-range components for more accessibility to the general market but gets a few notable upgrades from the entry-level 9.6.

The most significant improvement is the step up to SLX/XT drivetrain components with MT501 brakes. Additionally, the 9.7 gets Bontrager Kovee Elite 30 carbon fiber wheels.

Other notable changes include an E*thirteen alloy crankset, a Bontrager P3 Verse Elite stainless steel saddle, and vibration-absorbing ESI chunky grips. All of these changes reduce weight by 1.6lbs to 25.41lbs. 

Trek Supercaliber 9.8

MRSP: from $6.550

The Trek Supercaliber 9.8 is the more affordable of the two pro-level models. The 9.8 is available in three builds , SRAM GX, GX AXS, and Shimano XT, with $1,000 separating them. 

The 9.8 gets several upgrades on the 9.7, including Kovee Pro 30 wheels and a carbon seatpost, stem, and handlebars. Additionally, the fork steps up to a Fox Performance 32 Step-Cast or a RockShox SID SL on the electronic SRAM build. 

The other major change is the improved groupset. Each 9.8 has a carbon crankset, and the SRAM models come with 10-52t cassettes. The 9.8 models are roughly 2.5lbs lighter than the 9.7. 

Trek Supercaliber 9.9

MRSP: $9,550 – $11,500

The Trek Supercaliber 9.9 is the most advanced model and comes from their latest lineup. It comes in two builds, SRAM XX1 AXS and Shimano XTR, with almost $2,000 separating them. 

Both Supercaliber 9.9s get Fox Float Factory shocks. In addition, the XTR has a Factory 32 Step-Cast Float fork, and the top model gets a RockShox SID SL Ultimate. 

The wheels are Bontrager’s highest grade Kovee XXX carbon wrapped in XR1 Team Issue tires. Unusually, the XTR is the only version with a dropper post, a Fox Transfer SL 100mm. 

Finally, the Trek Supercaliber 9.8 XX1 AXS has SRAM Level Ultimate brakes. Both weigh approximately 21.5lbs. 

How Does the Trek Supercaliber Perform on the Trails?

The Trek Supercaliber is a high-performance machine built for speed. So it’s no surprise that this bike is used by world-class cross-country athletes , including Jolanda Neff, in her 2021 Olympic XCO win. 

Where Does the Trek Supercaliber Thrive?

Trek Supercaliber weight and pedaling efficiency are its two standout characteristics. With an unusually light build for one of the best full-suspension bikes , you will have a distinct advantage over your competitors in a race environment. 

This efficiency comes from the stiff and lightweight OCLV carbon fiber frame with IsoStrut suspension. IsoStrut ensures you get maximum power from each pedal stroke for an incredibly snappy feel when you put the power down.

This bike is so efficient that the remote suspension lockout is only really beneficial for sprint efforts. The racey geometry of the Supercaliber means it is agile and responsive for cross-country-style trails, allowing you to maneuver tight situations and pick the smoothest line. 

Although it doesn’t ride like traditional 100mm XC bikes , it’s not far off. The 60mm travel in the rear provides just enough extra traction and comfort when you need it.

To get the best out of this bike, it helps to ride aggressively, attacking chunkier sections to avoid getting hung up. 

What Can Be Better?

There’s not much we would change about this bike. For the casual rider, the 60mm rear travel means this bike will quickly bottom out on big hits, meaning you’ve got to be more conservative on chunkier terrain. That said, this isn’t a bike for your typical rider. 

The one component that may be worth changing for some riders is the narrow 720mm handlebars. In addition, we’d like to see a dropper post to improve the bike’s overall capability. 

Trek Supercaliber Sizing

The Trek Supercaliber frameset is available in six sizes, S to XXL, with a rider height range from 5′ to 6’8″. 

• S – 5′ to 5’6″
• M – 5’3″ to 5’8″
• M/L – 5’5″ to 5’10”
• L – 5’10” to 6’2″
• XL – 6′ 1″ to 6’5″
• XXL – 6’5″ to 6’8″

This bike is a significant investment, so you’ll want to ensure it fits perfectly. If you fall between two frame sizes , visit a Trek dealer near you to test-ride the two models that might work. Alternatively, you can compare the Trek Supercaliber size chart and geometry to an XC bike you’ve ridden before. 

Bottom Line: Should You Buy a Trek Supercaliber

As we’ve seen, the Trek Supercaliber is a highly-specialized XC mountain bike, limiting its appeal to the broader market. 

Incredibly efficient suspension, a stiff, lightweight frame, agile geometry, and industry-leading components give this bike its ability on cross-country trails.

Jolanda Neff riding her Trek Supercaliber XC race bike to Olimpic victory.

This ability makes the Supercaliber an excellent choice for ambitious XC riders who want a bike to help them smash their PRs and win races. However, if you’re not obsessed with speed and just want a bike to handle a variety of trails and climb well, the Supercaliber mightn’t be for you. 

Add this premium race bike to your shortlist if you want pro-level performance and have the budget to match. 

Shop on TrekBikes.com

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About the Author

Jordan Grimes

10 thoughts on “ trek supercaliber review — podium-winning xc race bike ”.

Thanks so much for your assistance in my purchasing decision. Great article by the way!

You’re welcome, Edward! Have fun riding!

Thanks. Which SLR 2024 Supercaliber model would you recommend for an enthusiast who might race only once a year?

The lowest-priced SLR 9.8 XT Gen 2 should be plenty good!

I have a 2021 Trek Procaliber and love it. How would a 2024 Supercaliber compare to my Procaliber in shock absorption, handling, weight, etc.?

Hi Edward! To be honest, the two would feel very similar to ride, though the shock absorption and handling would be better on the 2024 model considering it has 10mm more travel and the carbon fiber technology is getting better and better in terms of weight and compliance. Other than that, they don’t differ all too much.

Thanks for your response. What would be a great alternative to the 2024 Supercaliber? How about the Specialized cross country bike? Or others?

Specialized Epic is a great alternative. At the moment, Specialized is running a massive discount, so you can get the full suspension Epic EVO for just $2,400 (down from $4,000), which is a pretty good deal (though stocks might be low). You could also consider the Specialized Chisel (Hardtail) or Canyon Lux, both are excellent choices.

Does the 2024 model now appeal to a broader base of non racers? Thanks.

I wouldn’t say so, Edward. The 2024 Trek Supercaliber is still an XC race bike—the cheapest model has a carbon frame and costs $4,300. Non-racers can get it, but it’s a commitment.

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Trek’s New Supercaliber Sets the Benchmark for XC Race Bike Performance

The revised Supercaliber has more suspension travel, a lower weight, and a dropper seatpost comes standard. Plus it’s an absolute rocket up hills.

The Takeaway: The new Trek Supercaliber is an unapologetic and uncompromising cross country racing machine. The second-generation platform adds travel with a new RockShox-made IsoStrut while maintaining its climbing prowess. All models feature a dropper seatposts.

Trek Supercaliber SLR 9.9 XX AXS

When launched in 2019, the first version of the Trek Supercaliber was mountain bike racing’s worst-kept secret. It was rumored, spy-shot, and raced throughout the UCI Mountain Bike World Cup season by Trek’s high-profile pro riders Jolanda Neff and Evie Richards. The brand went so far as to make a custom sleeve to hide the IsoStrut rear suspension from the world. The second-gen Supercaliber looks so much like the first that I would be shocked if many even noticed it being raced before its release.

Like the original, the new Supercaliber is an unapologetic and uncompromising cross country racing machine. The structurally integrated IsoStrut system still pivots at the bottom bracket, but the strut itself is now made by RockShox (instead of Fox). The new shock provides 80mm of dampened rear wheel travel, an increase of 25mm from the original. Trek notes the new Supercaliber yields an additional 3 to 5mm of flex-stay travel, depending on rider weight (but it's not included in the 80mm figure).

The original Supercaliber bridged the gap between fast-pedaling hardtails and more capable full suspension race rigs. With the addition of more travel, the new bike sheds the notion of being a soft tail and plants its flag firmly in the realm of full suspension. Supercaliber’s evolution tracks with the changes made to World Cup cross country courses over the past few seasons. With bigger and steeper obstacles added to races, the Supercaliber needed updates to keep up with other hyper-focused, lightweight, and efficient XC race bikes.

Geometry Updates

Trek updated the Supercaliber’s geometry in the most predictable way. Yup, say it with me: The new Supercaliber is longer and slacker.

Trek was careful not to go overboard with the changes, citing that the Supercaliber is still a purpose-built cross country bike. It feels wild to think of a 67.5-degree head tube angle as somewhat conservative. But considering the recently released Specialized Epic World Cup is a full-degree slacker, it almost feels like Trek is playing it safe.

Models and Pricing

Trek offers the Supercaliber in seven builds. Pricing starts at $4,200 for the base Supercaliber SL 9.6 and peaks at $11,700 for the range-topping Supercaliber SLR 9.9 XX AXS model.

New for the second-generation Supercaliber is two frame levels. The two lowest-priced models use an SL-level frame. The five pricier models feature an SLR-level frame with a lighter carbon layup and without internal cable guides to save weight. The SLR frame is available for $4,000.

• Supercaliber SLR 9.9 XTR — $9,550 Fox Factory 34 Step-Cast, RockShox IsoStrut, Shimano XTR M9100, Bontrager Kovee RSL Wheels
• Supercaliber SLR 9.9 XO AXS — $9,000 RockShox SID Ultimate, SRAM XO T-Type, Bontrager Kovee Pro 30 Wheels
• Supercaliber SLR 9.8 GX AXS — $7,350 RockShox SID, SRAM GX T-Type, Bontrager Kovee Comp 30 Wheels
• Supercaliber SLR 9.8 XT — $7,000 Fox Performance 34 Step-Cast, RockShox IsoStrut, Shimano XT M81000, Bontrager Kovee Elite 30 Wheels
• Supercaliber SL 9.7 AXS — $5,700 RockShox Reba RL, SRAM GX T-Type, Bontrager Kovee Comp 25 Wheels
• Supercaliber SL 9.6 — $4,200 RockShox Recon Gold RL, Shimano Deore / SLX, Bontrager Kovee Comp 23 Wheels

Trek Supercaliber SLR 9.8 GX AXS

Ride Impressions

First, a bike like the Supercaliber needs some context. This is a cross country race bike. When I say that the new Supercaliber is a capable descender, the caveat is that the bike is capable for an XC bike. This is not a bike you should take to a shuttle day with your enduro-loving friends.

The Supercaliber’s capability on technical terrain is very rider-dependent, much more so than a bike with more travel. The less suspension travel, the more rider skill comes into play.

When you charge into a technical section with precise line selection and full commitment, the Supercaliber rewards you by carrying momentum. But if you hesitate or waver, the bike gets bogged down just as easily. The bike can be unforgiving when you get it wrong but incredibly fast when you get it right.

The bike is absolutely world-class when it comes to going uphill. The Supercaliber is so efficient that the remote lockout almost felt redundant. The updated RockShox Twistlock lockout is a much-needed improvement over the previous version. It does a much better job of staying in the selected position. But I found myself locking out the Supercaliber only on paved or gravel roads. Even on slightly chunky fire road climbs, the bike rode better with the suspension open, simply for the added rear wheel traction.

If you seek a plush trail bike that floats over the trail, absorbing rocks and roots, I recommend looking at a different bike. Perhaps consider the much-loved Evil Following . Or the Rocky Mountain Element if you still want something lightweight. The Supercaliber is the right bike for two types of riders: those committed to racing XC and riders who love the feel of a lightweight mountain bike above all else.

Supercaliber or Epic World Cup?

If you are considering purchasing a Supercaliber, then it’s highly likely that you also are thinking about the latest Specialized Epic World Cup . The two bikes are incredibly similar in many ways. They share a strikingly similar look and are designed for the same purpose. They also have almost the same wheel travel (11omm front for both/80mm rear for the Supercaliber, 75mm for the Epic) and are similarly priced ($11,700 for the Supercaliber and $12,000 for the Epic) at the highest end.

The main difference between the two bikes is how they create their rear wheel travel. The Trek design uses a single pivot at the bottom bracket with the unique IsoStrut layout to achieve its travel figure. Specialized’s layout is more traditional—a mini-link hidden inside the top tube, just in front of the seat tube—that drives a more conventional shock.

The Supercaliber uses a cable lockout to control its front and rear suspension. The Epic uses its proprietary Brain system for the fork and a new adjustable negative air chamber for the rear shock. The Specialized design allows riders to adjust the force required to activate the suspension. But there is no way to adjust this system mid-ride.

The Supercaliber’s suspension felt much more active and usable in my testing. With the Epic, I had to compromise the suspension setup—either very firm or very soft. If you’re a “set it and forget it” type of rider, perhaps the Epic’s system will be right up your alley. Most serious XC racers use a remote lockout on their bikes because it’s easy to hit a switch to have fully active suspension when needed (or locked out when not). Specialized’s system worked okay in my testing, but it also left me more beat up on technical terrain.

I also give Trek big kudos for resisting the urge to stick a bunch of hose and cables through the headset (like Specialized and several other mountain bike brands have done lately). Headset cable routing makes servicing the upper headset bearing a massive pain, a problem only exacerbated by the extra maintenance often required on mountain bikes. Worse, there is no performance upside. Even if you could show a small number of watts saved by integrating the cables, that would hardly matter for racers because that whole area is always going to be covered by a number plate.

In terms of weight, the Epic World Cup is technically lighter than the Supercaliber, but not by much. The two large-sized bikes I weighed were only separated by a half-pound difference. And the Supercaliber includes a dropper post, while the Epic World Cup does not. Personally, I would happily take the 8-ounce weight penalty of one, even when racing.

The Epic is a very particular bike for a very particular type of rider. The Specialized is for someone who prefers the feel of riding a hardtail but who doesn’t want a hardtail.

For my money, the new Trek Supercaliber is the better overall race bike. Its suspension feels better, and the Supercaliber is nearly as light and avoids all the internal cabling headaches of its primary rival. Plus, the Trek is equipped with a dropper post.

Test Editor Dan Chabanov got his start in cycling as a New York City bike messenger but quickly found his way into road and cyclocross racing, competing in professional cyclocross races from 2009 to 2019 and winning a Master’s National Championship title in 2018. Prior to joining Bicycling in 2021, Dan worked as part of the race organization for the Red Hook Crit, as a coach with EnduranceWERX, as well as a freelance writer and photographer. 

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I Want A Race Bike: Blur, Epic or Supercaliber?

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I know the saying is to "race what you got" but I also hear there is also an "N+1 rule." The Blur, Epic & Supercaliber are in my size at various LBS in my area. I haven't had a chance to test any yet as the only one in stock is the Supercaliber, the rest can get there within 5-7 days. Any thoughts on these bikes? I have watch countless yourtube videos, read reviews, but they all seem to have nothing but praise on all of these. I am looking to go fast & push my limits. Price range is $7500. The other option is to wait a year, save more bump the budget next year. What say you?  

You already actually listed them in order from burliest and most xc focussed. Supercaliber has short travel. And some say it does not handle great on descend. Really a bike focus for XC course. Due to its short and efficient travel it doesn't really benefit much from locking it out. So, no brain or manual lockout needed. Epic has more travel but it has brain. Which, depend who you ask. It could be bad on leisure ride or god send on go fast and push the speed limit ride. More capable bike than Supercaliber overall. The antisquat of Epic suspension geometry is not really high. It need Brain to perform as good as it does. Blur has more anti-squat than Epic, yet no Brain to make small bump harsh. So, overall possibly plusher unless you lock it out. While Brain on Epic do the lock and unlock automatically, it has some delay due to the inertia valve nature. If you are active with your left hand to remotely lock and unlock suspension manually, Blur is the best route to go of this bunch IMO.  

The Epic pro is a killer build right in the 7k range. I have a Epic its great, but I think they are all great options. However across the board Santa Cruz's builds d are pretty awful for the money. I would personally go either Supercaliber or Epic for pushing the limits. Both will be snappier and feel more like a xc race bike than a Blur.  

wat get for 7k?  

I was just hunting for Blur TR's for my wife and I for racing endurance stuff again. But there's no frames available and their full SRAM builds were expensive compared to the Specialized equivalent (I need gripshift due to damaged thumb). I also couldn't find anywhere with the SRAM builds coming in to stock any time this year. So just picked up Epic EVO Experts for us both. I don't think you'd go wrong with any of the three if their sizing works and you can get a build that you like.  

They are all really good bikes that will get the task done. Epic: I think specialized sets the standard for carbon frames. The frame it self is fantastic, but the "brain" is one of those things you like or you don't like. You have to ride it to decide if it is for you. I spent a lot of time on an Epic this year, the brain wasn't terrible but I prefer bikes without it. Trek: Super interesting design. Not the lightest and short on travel but stiff. The bike took some initial heat but after being one of dominant bikes in WC racing this year it has proven race performance. Blur: Of the three I like it the most. Nothing weird going on with design, 100mm of travel, no weird shock mounts or brain, just a simple yet effective design. But, in Canada at least, they are quite poorly speced for the price.  

LMN said: They are all really good bikes that will get the task done. Epic: I think specialized sets the standard for carbon frames. The frame it self is fantastic, but the "brain" is one of those things you like or you don't like. You have to ride it to decide if it is for you. I spent a lot of time on an Epic this year, the brain wasn't terrible but I prefer bikes without it. Trek: Super interesting design. Not the lightest and short on travel but stiff. The bike took some initial heat but after being one of dominant bikes in WC racing this year it has proven race performance. Blur: Of the three I like it the most. Nothing weird going on with design, 100mm of travel, no weird shock mounts or brain, just a simple yet effective design. But, in Canada at least, they are quite poorly speced for the price. Click to expand...

I've got a Supercaliber and it is a ripping race bike. I bought it on a lark, figuring I'd sell it quickly, and I love the thing. It just wants to go, to the point that I'm going to jump back into a few endurance races at age 63, after about 7 years of "retirement". It's kind of a gentleman's hardtail -- or old guy's hardtail. 🙃 I had an Epic ages ago, and hated the brain, but others love them. They sure aren't cheap to service. It was the fastest, least fun bike I've ever owned. I have no firsthand experience with the Blur, but if this was going to be my only bike, and I was also going to trail ride some rougher stuff when I wasn't racing, I'd probably lean that way, of the 3 you're considering. Don't wait a year.  

Have you looked at the BMC Two stroke or 4 stroke…. Scott has some good models as well.  

Blur - Cross Country Bike | Santa Cruz Bicycles

I had an '18 Epic. The bike was okay. But I didn't like the Brain, and I didn't like how easy it blew through rear travel on hard hits. If anything I would go with the Evo here. Supercal was on my list as a pure XC race bike. But that's all I would use it for. Friend has the last generation of Spark and absolutely loves it. I just picked up an Intense Sniper and am overwhelmingly impressed. I will probably never know if it is as fast as the Epic or the HT I used to race, but it is the most fun XC bike I have ever ridden. And it certainly FEELS like it pedals FAR better than the Epic. With my current impression with the Sniper, the Blur would probably be higher on my list.  

Epic evo Sent from my iPhone using Tapatalk  

FJSnoozer said: Epic evo Click to expand...

All those bikes are capable of winning especially at the amateur level. Go with the one that is easiest to service, has the best warranty and best customer service.  

I was between the Blur TR and Epic Evo recently. The Blur seemed to be a solid grand more in cost for equivalent build levels and reviews suggested the Epic Evo was a slightly better descender. I'd already owned an SC Superlight and always wanted a Specialized, so I went with a '21 Epic Evo Expert. Absolutely loving it so far. The regular Epic would give me pause with the proprietary Brain suspension (Evo doesn't have this), would possibly choose the standard Blur if I wanted a 100mm travel race bike.  

Epic Evo with a nice carbon wheelset would be tasty.  

BLur and Epic just seem to be more flexible as mountain bikes vs. the Trek. I like both, and just wish the frame-only options weren't so damn expensive!  

Pivot Mach 4  

Pike fork (130mm travel) on xc frame! That's a stretch request from Epic frame that was designed for 100mm travel xc fork. I'd assume 120mm travel (Sid Ultimate) would be more appropriate.  

Hexsense said: Pike fork (130mm travel) on xc frame! That's a stretch request from Epic frame that was designed for 100mm travel xc fork. I'd assume 120mm travel (Sid Ultimate) would be more appropriate. Click to expand...

I know it's Epic Evo. But... Epic Evo share the same front triangle as Epic. Only rear linkage and rear triangle are different (no brain). Hence why Epic Evo frameset weight is lighter than Epic. Because it's that super light (not saying it wouldn't be durable enough for trail use) xc frame minus the brain. So, Epic Evo was already a stretched, overforked Epic. Here we overforked it further. Not saying it wouldn't work. But to think where front triangle started started as makes 130mm travel fork out of place.  

Plenty of bikes share the same front triangle such as the GG. The dimensions of the front triangle are only a small percentage of the make up of the bike. It’s a 110 frame, that runs a 120 fork. Lengthening it 10mm which at sag is. 8mm increase, is no big deal, not to mention that you could go to a 51 offset fork which could bring stack down a hair. The old epic evo was an over forked evo, this bike is a different bike. Sent from my iPhone using Tapatalk  

Agree to disagree then. I count same front center as the half of the same frame. The old Evo was totally Epic with longer fork (short rear travel and still has brain). This current Evo is still XC front center, with no brain and different linkage and rear center to make it 110mm rear travel. Front center is still XC light. It isn't trail burly like Stumpjumper. Rear center doesn't gain any bulk/durability either, it just lose brain. It's Evo version of Epic (Epic with more fork and shock travel). Not becoming trail bike (Stumpjumper). Anything that really demand Pike fork are a bit too burly for light xc frame IMO. Stumpjumper doesn't gain weight over Epic for nothing. I'm not saying 120 to 130mm travel is a big gap. But I'm saying there is a gap in weight, build and intended usage between Sid Ultimate 120mm travel to Pike. Hence why it's out of place pairing with Ultra light XC frame.  

How does the Supercaliber compare to a hard tail?  

I wish I could've test ridden the super caliber. Just remember you'd be limited on tire width with the super caliber to either 2.2 or maybe 2.25 which may not be an issue for you. I love riding technical trails, so I ultimately decided it wouldn't be the best bike for me. I demoed the Epic pro and it was a stunner on the climbs, literally any climb it did so efortlessly. On any other parts of the trail, I felt I was getting beaten up. It is super nice to not have to think about locking out the bike. The brain was ultimately a deal breaker for me. I read too many negative things and didn't want to deal with sending in for service etc. If money was no object, I'd probably do was Russel Finsterwald does and swap the fork to a Fox fork (or other non-brain) and that would be a pretty damn good bike. Can't comment on the Blur, but it seems the safest bet of the three. I ended up with the Epic Evo and I love it so far. As posted above, some people spec them as trail bikes, and others more to the lightweight XC side. I appreciate the versatility and lack of brain.  

djr21589 said: I wish I could've test ridden the super caliber. Just remember you'd be limited on tire width with the super caliber to either 2.2 or maybe 2.25 which may not be an issue for you. I love riding technical trails, so I ultimately decided it wouldn't be the best bike for me. I demoed the Epic pro and it was a stunner on the climbs, literally any climb it did so efortlessly. On any other parts of the trail, I felt I was getting beaten up. It is super nice to not have to think about locking out the bike. The brain was ultimately a deal breaker for me. I read too many negative things and didn't want to deal with sending in for service etc. If money was no object, I'd probably do was Russel Finsterwald does and swap the fork to a Fox fork (or other non-brain) and that would be a pretty damn good bike. Can't comment on the Blur, but it seems the safest bet of the three. I ended up with the Epic Evo and I love it so far. As posted above, some people spec them as trail bikes, and others more to the lightweight XC side. I appreciate the versatility and lack of brain. Click to expand...

Bikes will always take a bigger tire than the manufacturer will recommend. The manufacturer recommendation is to allow run for a wheel to come out of true and for some mud to accumulate. It is worth considering the consequences if you get it wrong. I was at a muddy World Cup 3 or 4 years ago and a ton of frames got destroyed from mud getting jammed between the wheels and the frame.  

IIRC, Trek bases their max tire size recommendation off a minimum clearance of 7 mm, and that comes from the CPSC?  

My '22 Blur will fit a 2.6 with plenty of room.  

Does anybody know if that 2.6 Mezcal will fit in an Epic (Evo) or a Fox 34 Step Cast? Is it a TR? Does it use a standard boost chainline, or the 55mm like the Spark & Top Fuel? TIA  

UPDATE: Have a Blur C S on order (they say will be here in June). I just got a call from the local shop that they have a Supercaliber 9.8 GX in stock right now for my size! Both are in the $5500 range. What would you do?  

Jolyzara said: UPDATE: Have a Blur C S on order (they say will be here in June). I just got a call from the local shop that they have a Supercaliber 9.8 GX in stock right now for my size! Both are in the $5500 range. What would you do? Click to expand...

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Trek Supercaliber vs Specialized Epic

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What to Consider When Buying a Cross-Country Mountain Bike

When venturing into the world of cross-country mountain biking, it’s essential to consider several key factors before making a purchase. With top-tier brands like Trek and Specialized offering high-performance bikes like the Supercaliber and Epic, understanding your needs and preferences is crucial in finding the perfect bike.

Terrain plays a significant role in determining the type of bike you need. Will you be tackling technical singletrack, or cruising along smooth, flowy trails? Different bikes are designed to excel in specific environments, so it’s crucial to choose a bike that aligns with your riding style. Additionally, consider your budget – cross-country mountain bikes can range from a few thousand to tens of thousands of dollars, so it’s essential to set a realistic budget before making a purchase.

Riding style is another critical factor to consider. Are you a casual rider looking for a comfortable, efficient ride , or a competitive racer seeking a bike that can keep up with your aggressive pace? Understanding your riding style will help you narrow down your options and find a bike that meets your needs. By taking the time to consider these factors, you’ll be well on your way to finding the perfect cross-country mountain bike for your needs, whether it’s the Trek Supercaliber or Specialized Epic.

Introducing the Contenders: Trek Supercaliber and Specialized Epic

In the world of cross-country mountain biking, two bikes stand out from the rest: the Trek Supercaliber and the Specialized Epic. Both bikes are designed to deliver exceptional performance, efficiency, and comfort on the trails. But what sets them apart, and which one is right for you?

The Trek Supercaliber is a high-performance XC bike designed for riders who demand the best. With its lightweight OCLV Mountain Carbon frame, the Supercaliber is built for speed and agility. Its IsoStrut suspension system provides 60mm of rear travel, making it an excellent choice for riders who tackle technical terrain. The Supercaliber is available in a range of models, from the entry-level 8 to the top-of-the-line 9.9, offering something for every type of rider.

The Specialized Epic, on the other hand , is a purpose-built XC race bike. Its FACT 12m carbon frame is designed to be lightweight and stiff, making it an ideal choice for riders who prioritize speed and efficiency. The Epic features a Brain 2.0 suspension system , which provides 100mm of rear travel and is designed to be highly responsive and adaptable to different terrain. The Epic is available in a range of models, from the Comp to the S-Works, offering a range of options for riders of different skill levels and budgets.

Both the Trek Supercaliber and Specialized Epic are designed to deliver exceptional performance and handling, but they cater to different types of riders and riding styles. By understanding the key features and specifications of each bike, riders can make an informed decision about which one is right for them. In the following sections , we’ll delve deeper into the suspension, geometry, componentry, and real-world performance of these two exceptional XC bikes.

How to Choose Between the Trek Supercaliber and Specialized Epic

When deciding between the Trek Supercaliber and Specialized Epic, it’s essential to consider several key factors that will impact your riding experience. Both bikes are designed to deliver exceptional performance, but they cater to different types of riders and riding styles. By understanding the strengths and weaknesses of each bike, riders can make an informed decision about which one is right for them.

One of the most critical factors to consider is suspension. The Trek Supercaliber features an IsoStrut suspension system, which provides 60mm of rear travel and is designed for riders who tackle technical terrain. The Specialized Epic, on the other hand, features a Brain 2.0 suspension system, which provides 100mm of rear travel and is designed for riders who prioritize speed and efficiency. Riders who prefer a more comfortable ride may prefer the Epic, while those who need a bike that can handle rough terrain may prefer the Supercaliber.

Geometry is another critical factor to consider. The Trek Supercaliber has a slightly slacker head tube angle and a longer wheelbase than the Specialized Epic, making it more stable at high speeds. The Epic, on the other hand, has a steeper head tube angle and a shorter wheelbase , making it more agile and responsive. Riders who prioritize speed and efficiency may prefer the Epic, while those who need a bike that can handle rough terrain may prefer the Supercaliber.

Componentry and build quality are also essential factors to consider. Both bikes feature high-quality components, including lightweight frames, reliable drivetrains, and powerful brakes. However, the Trek Supercaliber is available in a range of models, from the entry-level 8 to the top-of-the-line 9.9, offering something for every type of rider. The Specialized Epic, on the other hand, is available in a range of models, from the Comp to the S-Works, offering a range of options for riders of different skill levels and budgets.

Ultimately, the decision between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. By considering factors such as suspension, geometry, and componentry, riders can make an informed decision about which bike is right for them. In the following sections, we’ll delve deeper into the suspension, geometry, and componentry of these two exceptional XC bikes, providing a comprehensive comparison of the Trek Supercaliber vs Specialized Epic.

Suspension and Handling: A Closer Look

When it comes to suspension and handling, the Trek Supercaliber and Specialized Epic take different approaches. The Supercaliber features an IsoStrut suspension system, which provides 60mm of rear travel and is designed to be highly responsive and adaptable to different terrain. This system is ideal for riders who tackle technical terrain, as it provides a smooth and controlled ride. The IsoStrut system also features a unique “decoupler” design, which allows the suspension to move independently of the frame, reducing the impact of pedaling on the suspension.

The Specialized Epic, on the other hand, features a Brain 2.0 suspension system , which provides 100mm of rear travel and is designed to be highly efficient and responsive. This system is ideal for riders who prioritize speed and efficiency, as it provides a smooth and fast ride. The Brain 2.0 system also features a unique “inertia valve” design, which allows the suspension to adapt to different terrain and riding styles.

One of the key advantages of the Trek Supercaliber’s IsoStrut system is its ability to handle rough terrain. The system is highly responsive and adaptable, making it ideal for riders who tackle technical trails. The Supercaliber’s suspension also provides a more comfortable ride , making it ideal for riders who prioritize comfort and control.

The Specialized Epic’s Brain 2.0 system, on the other hand, is highly efficient and responsive. The system is designed to provide a smooth and fast ride, making it ideal for riders who prioritize speed and efficiency. The Epic’s suspension also provides a more agile and responsive ride, making it ideal for riders who prioritize handling and maneuverability.

Ultimately, the choice between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. Riders who prioritize comfort and control may prefer the Supercaliber, while riders who prioritize speed and efficiency may prefer the Epic. By understanding the strengths and weaknesses of each bike’s suspension system, riders can make an informed decision about which bike is right for them. In the next section, we’ll examine the geometry and fit of the Trek Supercaliber and Specialized Epic, highlighting their differences and how they impact the riding experience.

Geometry and Fit: Finding the Perfect Bike for Your Riding Style

When it comes to geometry and fit, the Trek Supercaliber and Specialized Epic take different approaches. The Supercaliber features a slack 68.5-degree head tube angle, a 74.5-degree seat tube angle, and a 435mm reach, making it ideal for riders who prioritize stability and control. The Epic, on the other hand, features a slightly steeper 69.5-degree head tube angle, a 75-degree seat tube angle, and a 420mm reach , making it ideal for riders who prioritize agility and responsiveness.

The Trek Supercaliber’s geometry is designed to provide a comfortable and stable ride, making it ideal for riders who tackle technical terrain. The bike’s slack head tube angle and long wheelbase provide a smooth and controlled ride, while its low bottom bracket height and short chainstays provide excellent pedaling efficiency.

The Specialized Epic’s geometry, on the other hand, is designed to provide a fast and agile ride, making it ideal for riders who prioritize speed and efficiency. The bike’s steeper head tube angle and shorter wheelbase provide a quick and responsive ride , while its higher bottom bracket height and longer chainstays provide excellent power transfer.

In terms of fit, both bikes offer a range of sizes to accommodate riders of different heights and inseams. The Trek Supercaliber is available in five sizes, ranging from small to extra-large, while the Specialized Epic is available in six sizes, ranging from small to extra-extra-large. Both bikes also feature adjustable seatposts and handlebars, allowing riders to fine-tune their fit and comfort.

Ultimately, the choice between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. Riders who prioritize stability and control may prefer the Supercaliber, while riders who prioritize agility and responsiveness may prefer the Epic. By understanding the geometry and fit of each bike, riders can make an informed decision about which bike is right for them. In the next section, we’ll compare the componentry and build quality of the two bikes, including their wheels, brakes, and drivetrains.

Componentry and Build Quality: What You Need to Know

When it comes to componentry and build quality, the Trek Supercaliber and Specialized Epic are both top-notch, but they have some key differences. The Supercaliber features a SRAM GX Eagle drivetrain , Shimano XT brakes, and Bontrager Kovee Elite 30 wheels, making it a great option for riders who prioritize reliability and durability. The Epic, on the other hand, features a SRAM XX1 Eagle drivetrain, Shimano XTR brakes, and Roval Control SL wheels, making it a great option for riders who prioritize lightweight and high-performance components.

In terms of build quality, both bikes are exceptionally well-made, with attention to detail and a focus on durability. The Supercaliber features a OCLV Mountain Carbon frame , which is both lightweight and strong, while the Epic features a FACT 12m carbon frame, which is both stiff and responsive. Both bikes also feature internal cable routing, which helps to reduce maintenance and improve the overall aesthetic of the bike.

One of the key advantages of the Trek Supercaliber is its ability to handle rough terrain. The bike’s Bontrager Kovee Elite 30 wheels are designed to be both strong and durable, making them ideal for riders who tackle technical trails. The Supercaliber’s SRAM GX Eagle drivetrain is also highly reliable, making it a great option for riders who prioritize durability.

The Specialized Epic, on the other hand, is designed to be a high-performance machine . The bike’s Roval Control SL wheels are both lightweight and responsive, making them ideal for riders who prioritize speed and efficiency. The Epic’s SRAM XX1 Eagle drivetrain is also highly efficient, making it a great option for riders who prioritize power transfer.

Ultimately, the choice between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. Riders who prioritize reliability and durability may prefer the Supercaliber, while riders who prioritize lightweight and high-performance components may prefer the Epic. By understanding the componentry and build quality of each bike, riders can make an informed decision about which bike is right for them. In the next section, we’ll provide real-world examples of how the Trek Supercaliber and Specialized Epic perform on the trails, including their strengths and weaknesses.

Real-World Performance: How the Trek Supercaliber and Specialized Epic Stack Up

When it comes to real-world performance, the Trek Supercaliber and Specialized Epic are both exceptional cross-country mountain bikes. However, they have some key differences in terms of their strengths and weaknesses. In this section, we’ll provide real-world examples of how these bikes perform on the trails, highlighting their advantages and disadvantages.

The Trek Supercaliber is a beast on technical terrain. Its slack head tube angle and long wheelbase provide a stable and confident ride, making it ideal for riders who tackle rough trails. The bike’s suspension system, which features a Fox Performance 32 fork and a Trek IsoStrut rear shock , provides excellent absorption and control, allowing riders to push their limits with confidence.

In contrast, the Specialized Epic is a speed demon. Its steeper head tube angle and shorter wheelbase provide a quick and agile ride , making it ideal for riders who prioritize speed and efficiency. The bike’s suspension system, which features a RockShox SID fork and a Specialized Brain rear shock, provides excellent pedaling efficiency and control, allowing riders to accelerate quickly and maintain speed.

In terms of climbing, the Specialized Epic is the clear winner . Its lightweight frame and efficient suspension system make it an excellent choice for riders who prioritize climbing performance. The Trek Supercaliber, on the other hand, is a bit heavier and more focused on descending performance.

On the descents, the Trek Supercaliber is the clear winner. Its slack head tube angle and long wheelbase provide a stable and confident ride, making it ideal for riders who tackle rough and technical trails. The Specialized Epic, on the other hand, is a bit more nervous and requires more skill and attention to navigate technical terrain.

Ultimately, the choice between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. Riders who prioritize technical descending and rough terrain may prefer the Supercaliber, while riders who prioritize speed and efficiency may prefer the Epic. By understanding the real-world performance of each bike, riders can make an informed decision about which bike is right for them. In the next section, we’ll summarize the key findings and provide a conclusion on which bike is best suited for different types of riders and riding styles.

The Verdict: Which Bike is Right for You?

After a thorough comparison of the Trek Supercaliber and Specialized Epic, it’s clear that both bikes are exceptional cross-country mountain bikes. However, they cater to different types of riders and riding styles. In this section, we’ll summarize the key findings and provide a conclusion on which bike is best suited for different types of riders and riding styles.

For riders who prioritize technical descending and rough terrain, the Trek Supercaliber is the clear winner . Its slack head tube angle, long wheelbase, and robust suspension system make it an excellent choice for tackling challenging trails. Additionally, its componentry and build quality are top-notch, providing a reliable and durable ride.

On the other hand, for riders who prioritize speed and efficiency, the Specialized Epic is the clear winner. Its steeper head tube angle, shorter wheelbase, and lightweight frame make it an excellent choice for riders who want to accelerate quickly and maintain speed. Additionally, its suspension system is highly efficient, providing excellent pedaling performance.

Ultimately, the choice between the Trek Supercaliber and Specialized Epic comes down to personal preference and riding style. Riders who want a bike that can handle rough terrain and technical descents may prefer the Supercaliber, while riders who want a bike that can deliver speed and efficiency may prefer the Epic. By understanding the strengths and weaknesses of each bike, riders can make an informed decision about which bike is right for them.

In conclusion, the Trek Supercaliber vs Specialized Epic debate is a tough one, as both bikes are exceptional in their own ways. However, by considering factors such as suspension, geometry, componentry, and real-world performance, riders can make an informed decision about which bike is best suited for their riding style and preferences. Whether you’re a seasoned pro or a beginner, there’s a Trek Supercaliber or Specialized Epic out there for you.

Specialized Epic 8 Review | The all-new 120mm travel Epic is Brainless, but all the better for it!

The not-so-minor details.

Specialized Epic 8

Specialized

https://www.specialized.com/

From $7,500 AUD ($24,000 AUD as tested)

- Active & highly capable suspension - Contemporary geometry with nifty Hi/Lo flip chip - Same brilliant SIDLuxe custom shock tune on all models - Flight Attendant system on S-Works Epic is a genuine game changer - New generation SWAT storage is fabulous - Lightweight & practical frame design

- The S-Works bike is eye-poppingly expensive - SRAM Level brakes have too much dead stroke - No alloy models

Wil reviews the Specialized Epic 8

Cast your mind back 22 years ago, when the Specialized Epic debuted on the race scene with its iconic Brain shock. The clever inertia valve formed an integral part of the bike’s automatic-lockout schtick and it’s been a defining feature of the Epic ever since.

Two decades and many revisions later, Specialized is launching the latest version of the Epic and, for the first time ever, there is not a Brain damper in sight. In fact, this is the first Epic where most models will come with a remote lockout. Sacre bleu!

To get to grips with this change in attitude, I’ve been putting in a load of saddle time aboard the new Specialized Epic and Epic EVO over the past two months. We wrapped up testing with a few days at the Buxton MTB Park in Victoria’s High Country, which allowed us to ride both bikes back-to-back and really dig down into the details.

So what exactly are the differences? How does the new Epic compare to the short travel Epic World Cup ? And where do they all sit amongst the best XC bikes on the market?

Watch our video review of the Specialized Epic & Epic EVO:

I gotta say, we are absolutely loving this new trend for 120mm travel XC bikes, and the Specialized Epic is arguably the best example yet.

An overview of the Specialized Epic 8

All new for 2024, the latest Specialized Epic represents the 8th generation of the race bike platform. As part of the launch, Specialized is adopting a new naming system that moves away from traditional year models. Instead, the new bike will simply be known as the ‘Epic 8’. Expect other models to follow this nomenclature in the future.

Also noteworthy is the fact that there are three distinct variants of the Epic platform. These are;

• Epic World Cup – 110/75mm travel, smooth course XC race bike
• Epic – 120/120mm travel, all-round XC & marathon race bike
• Epic EVO – 130/120mm travel, XC and trail riding

Here we’ll be covering the Epic, which features an all-new frame for 2024 along with an increase in travel to 120mm front and rear. It’s pitched as a versatile XC race bike that’s ready for marathon and multi-day stage racing. And in a lot of ways it’s the logical successor to the previous Epic EVO that had become the favoured race bike for the World Cup XC team. With its dedicated 120mm travel platform, the new Epic 8 moves further inline with the latest Scott Spark RC & Orbea Oiz .

Brainless, but better?

Aside from its longer legs, one of the biggest stories for the Epic 8 is its distinct lack of a Brain damper.

In its place is a mostly conventional RockShox SIDLuxe shock. There’s a relatively straightforward single pivot suspension platform that uses flex stays with a rocker link and yoke to drive the shock. The layout is pretty similar to the previous Epic EVO, though the link is longer and it sits at a flatter angle to lower the initial leverage rate.

Furthermore, the main pivot has been lifted up to increase anti-squat, which sits at around 100% at sag. As a result, the new Epic is claimed to offer 20% less pedal bob on smooth climbs compared to the old Epic EVO. And since the new kinematic keeps the bike riding higher in its travel, the dynamic head angle is pretty similar when climbing even if the on-paper head angle has gotten slacker.

The end result is a bike that’s purported to be both more efficient and more compliant than its predecessors, making it “ the most capable 120mm bike on the planet. ” Fighting words indeed!

Specialized has got a whole bunch of fancy graphs and illustrations to back up its claims and prove how much testing went into the new bike. Prototype mules were developed with angle-adjustable headsets and flip chips, as well as an eccentric BB to change the height and rear centre length. Accelerometers were then used at the wheels to measure bump response, and strain gauges were employed throughout to record frame deflection. The end result is a bike that’s purported to be both more efficient and more compliant than its predecessors, making it “ the most capable 120mm bike on the planet. ” Fighting words indeed!

Standard-ish shock

Each Epic model comes equipped with a RockShox SID and SIDLuxe suspension package. The shock’s 190x45mm size is standard, though the internals have been custom-tuned by Specialized’s in-house Ride Dynamics team specifically for the Epic.

A key component is the high volume air spring. There are no Bottomless Tokens inside, and even the plastic eyelet spacer has been removed to maximise air volume, creating a flatter and more consistent spring curve.

To help cushion the end of the travel, Specialized has brought over the big rubber jounce bumper that was originally developed for the SIDLuxe WCID shock on the Epic World Cup. It’s a simple but highly effective solution for preventing harsh bottoming out.

Specialized has also tuned the shock’s damper to provide three distinct modes; Wide Open, Magic Middle and Sprint-On-Lock.

Wide Open is similar to a regular SIDLuxe shock and is exactly as it sounds. Sprint-On-Lock is designed to provide a super stiff lockout, which is supported by the flatter leverage curve of the new kinematic.

Magic in the Middle

The Magic Middle mode is where things get interesting. This deploys a custom valve that features a digressive compression tune. It’s not a dissimilar concept to the old Brain damper, where the shock delivers more low-speed compression damping at lower shaft speeds to provide pedalling support. Hit something hard and fast however, and the damping drops off quickly to let the shock absorb the impact in a similar way to the Wide Open mode.

Specialized takes this concept further by implementing the digressive compression tune into the Epic’s SID fork as well. That means in the Magic Middle mode you get an efficient pedalling platform at both ends of the bike, which Specialized says is ideal for racing. In fact, it turns out the World Cup race team has been using the new custom suspension tune all throughout the 2023 season.

To switch between these three suspension modes, on most Epic models you’ll be using a RockShox TwistLoc remote . Yep, a remote lockout on an Epic, who woulda thunk it!

Move up to the S-Works Epic, and you do get automated suspension courtesy of the new RockShox Flight Attendant system. More on that in a bit.

SWAT storage

Another exciting addition to the Specialized Epic 8 is its in-frame storage. This is a curious decision for an XC race bike where weight is a high priority, though Specialized says it only adds around 75g of extra carbon to reinforce the big hole in the downtube.

It is neatly executed too with a new generation hatch that features a lower profile and an ergonomic lever mechanism. The snug fit is claimed to be watertight and rattle-free, and the underside of the hatch incorporates a holster for carrying a Dynaplug and CO2 cylinder. A dry bag is included with the bike, allowing you to store a spare tube and levers inside the frame. Along with the SWAT tool that sits underneath the main bottle cage, you’re pretty well covered for tools and spares.

Specialized Epic frame weight

Despite the addition of downtube storage, the new Specialized Epic 8 frame is supposedly 76g lighter than its predecessor. Getting rid of the Brain no doubt helps, but there are some more subtle weight-saving details throughout.

The shock mounting tabs are said to be 24g lighter as they’re now moulded into the frame rather than being stuck on. Along with titanium pivot hardware and a new carbon shock yoke, the S-Works Epic FACT 12m carbon frame is claimed to weigh just 1,795g including a SIDLuxe remote shock.

All the other Epic models utilise a cheaper FACT 11m carbon frame that features an alloy shock yoke and steel pivot hardware, resulting in a 170g weight penalty.

Here’s how those claimed weights stack up against the competition;

• Specialized S-Works Epic World Cup  – 1,712g
• Cervelo ZFS-5 – 1,718g
• Giant Anthem Advanced Pro  – 1,735g
• Specialized S-Works Epic 8 (FACT 12m) – 1,795g
• Orbea Oiz OMX  – 1,798g
• Scott Spark HMX SL  – 1,870g
• Canyon Lux World Cup CFR  – 1,894g
• Cannondale Scalpel Hi-Mod  – 1,910g
• Santa Cruz Blur 4  – 1,933g
• Trek Supercaliber SLR – 1,950g
• Specialized Epic 8 (FACT 11m) – 1,965g
• Merida Ninety-Six RC  – 2,064g
• Pivot Mach 4 SL  – 2,087g

Specialized Epic geometry & size chart

The new Specialized Epic 8 continues to push the boundaries of modern XC geometry.

There’s a 66.4° head angle, a 76° seat angle and a 450mm reach in the size Medium. You might also spot a discreet two-position flip chip in the lower shock mount. Complete bikes will come from the factory set up in the High position, and switching to Low will drop the BB by 5mm and slacken the angles by half a degree.

Rear centre length sits at 435mm across the size range. I asked Brian Gordon, the Epic product manager, whether a size-specific approach had been considered. He said they did test longer chainstays on the bigger frame sizes, but feedback from the Specialized Factory Racing team (including a 1.85m tall bloke called Christopher Blevins) indicated that athletes wanted the back end to be as short as possible. So there you go.

Specialized Epic 8 price & specs

There will be four models in the Specialized Epic 8 lineup, with prices starting at $7,500 AUD for the Comp.

Regardless of price, all models feature a RockShox SID fork and SIDLuxe shock. Each bike comes standard with a dropper post (woohoo!) as well as the same Specialized Fast Trak and Renegade tyre combo.

Our test bike is the all-singing, all-dancing S-Works model. This is the only bike to feature the premium FACT 12m carbon frame, and it’s also the only one to come with RockShox Flight Attendant. Brand new for 2024, the XC version of Flight Attendant has some seriously cool stuff going on that includes powermeter integration. We’ll be talking about that a bit in this review, but given most folks will be looking at one of the cheaper models, I feel it’s important not to get too lost in the weeds. For those who really want to nerd out, see our separate Flight Attendant XC feature for everything you need to know.

2024 Specialized S-Works Epic 8

• Frame | FACT 12m Carbon, Single-Pivot Suspension Design, 120mm Travel
• Fork | RockShox SID Ultimate, Flight Attendant, 44mm Offset, 120mm Travel
• Shock | RockShox SIDLuxe Ultimate, Flight Attendant, 190x45mm
• Wheels |  Roval Control SL, Carbon Rims, 29mm Inner Width
• Tyres | Specialized Fast Trak T7 Control 2.35in Front & Renegade T5 Control 2.35in Rear
• Drivetrain | SRAM XX SL Eagle AXS Transmission 1×12 w/34T Carbon Crankset & 10-52T Cassette
• Brakes | SRAM Level Ultimate 4-Piston w/180mm Front & 160mm Rear Rotors
• Bar |  Roval Control SL Cockpit, 760mm Width
• Stem | Roval Control SL Cockpit, 60mm Length
• Seatpost | RockShox Reverb AXS, 30.9mm Diameter, Travel: 125mm (S-M), 150mm (L), 170mm (XL)
• Saddle |  Specialized S-Works Power, Carbon Rails
• Claimed Weight | 10.24kg
• RRP | $24,000 AUD

2024 Specialized Epic 8 Pro

• Frame | FACT 11m Carbon, Single-Pivot Suspension Design, 120mm Travel
• Fork | RockShox SID Ultimate, Charger Race Day 3-Position Damper, 44mm Offset, 120mm Travel
• Shock | RockShox SIDLuxe Ultimate, 3-Position Damper, 190x45mm
• Wheels | Roval Control, Carbon Rims, 29mm Inner Width
• Drivetrain | SRAM X0 Eagle AXS Transmission 1×12 w/34T Alloy Crankset & 10-52T Cassette
• Brakes | SRAM Level Silver 4-Piston w/180mm Front & 160mm Rear Rotors
• Bar | S-Works Carbon XC Mini Rise, 10mm Rise, 760mm Width
• Stem | Specialized Pro SL, 60mm Length
• Seatpost | BikeYoke Divine SL, 30.9mm Diameter, Travel: 100mm (S), 125mm (M-XL)
• Saddle | Specialized Power Expert, Titanium Rails
• Claimed Weight | 10.87kg
• RRP | $14,800 AUD

2024 Specialized Epic 8 Expert

• Fork | RockShox SID Select+, Charger Race Day 3-Position Damper, 44mm Offset, 120mm Travel
• Shock | RockShox SIDLuxe Select+, 3-Position Damper, 190x45mm
• Drivetrain | SRAM GX Eagle AXS Transmission 1×12 w/34T Alloy Crankset & 10-52T Cassette
• Brakes | SRAM Level Bronze 4-Piston w/180mm Front & 160mm Rear Rotors
• Bar | Specialized Alloy Mini Rise, 10mm Rise, 750mm Width
• Stem | Specialized XC, 60mm Length
• Seatpost | X-Fusion Manic, 30.9mm Diameter, Travel: 100mm (XS), 125mm (S-M), 150mm (L), 170mm (XL)
• Saddle | Specialized Power Sport, Chromoly Rails
• Claimed Weight | 11.1kg
• RRP | $11,000 AUD

2024 Specialized Epic 8 Comp

• Fork | RockShox SID Select, Charger RL 3-Position Damper, 44mm Offset, 120mm Travel
• Wheels | Alloy Hubs & Specialized Alloy Rims, 28mm Inner Width
• Drivetrain | SRAM GX Eagle 1×12 w/32T Alloy Crankset & 10-52T Cassette
• Stem | Specialized Alloy, 60mm Length
• Claimed Weight | 11.7kg
• RRP | $7,500 AUD

With your feet hovering above the ground, stability at speed is outrageously good and you can properly bury the Epic into tight corners.

Testing the Specialized Epic at the Buxton MTB Park

Following two months of riding on home trails, I took the Specialized Epic and Epic EVO to the Buxton MTB Park for three days of back-to-back testing as part of our Ride High Country Test Sessions.

We were joined by our pal Jo, who is an MTB skills instructor and a former World Cup XC racer. Jo also owns the previous version of the Epic EVO, which would prove to be a great point of comparison with the new bikes.

With 23km of flowy, purpose-built singletrack making up its network, the Buxton MTB Park is a terrific spot for a modern XC bike. It’s beautiful bush to ride through, and we especially love darting through the lush green ferns down the awesome Spider Gully trail.

Being just a 10-minute drive from Marysville at the foot of Lake Mountain, there’s a load of fantastic riding to be done in the region that makes it ideal for a long weekend away. For more info, check out our Destination Hub feature on the Buxton MTB Park .

Sizing & fit

At 175cm tall I’ve been riding a Medium size in the Specialized Epic, which fits like a glove. The riding position is fairly aggressive due to the steep 76° seat angle, short head tube and -12° stem that all serve to push you low and forward. I still found it to be comfortable though, with the 760mm wide bars opening up the chest nicely.

Touch points are excellent thanks to the snub-nose Power saddle and symmetrical SRAM AXS Pod controllers. I was also stoked to see a 125mm travel dropper post as standard.

Suspension & tyre setup

It’s recommended to set up the SIDLuxe shock on the Specialized Epic with 25-30% sag, a process that’s made easier with anodised gradients on the stanchion.

Initially I started at 25% sag, but soon learned I could run lower pressures and lean on the big bottom-out bumper to prevent any harsh bottoming-out. I ended up right at 30% sag, which required 145psi to support my 67kg riding weight. Rebound damping was set on the faster side at 7/10 clicks.

I set up the SID fork a little firmer and faster than what’s recommended in the RockShox Trailhead app, with 75psi and 11/20 clicks for rebound.

As per usual, I fitted a CushCore XC insert in the rear wheel and set tyre pressures at 20-21psi up front and 22-23psi out back.

Specialized Epic weight

Our Specialized Epic test bike tips the scales at 10.32kg (without pedals and with the tyres set up tubeless), which is very close to the claimed weight. There are lighter XC bikes out there, but very few offer 120mm of travel.

Because I’m a total nerd, I decided to spend a Saturday afternoon stripping the Epic down to its bare frame to weigh it. This was surprisingly easy to do given the wireless controls and threaded BB, with no special tools required.

I was curious to see how the real-world frame weight would stack up against Specialized’s claims, and it turned out our frame was a fair bit heavier at 2,040g including the shock. There are several reasons for this.

Because I’m a total nerd, I decided to spend a Saturday afternoon stripping the Epic down to its bare frame to weigh it.

For a start, the Flight Attendant shock is 90g heavier than the SIDLuxe remote shock that comes standard on the S-Works frameset. Specialized also states that the black and white frame saves 25g in paint, and it’s also weighed without the thick rubber downtube protector that adds 58g alone.

With those details factored in, our frame would theoretically tip the scales at 1,867g, which is much closer to the claimed weight. To put it into perspective with the other XC frames I’ve been able to weigh, it’s lighter than the Canyon Lux World Cup CFR (1,941g confirmed), but heavier than the Giant Anthem (1,807g confirmed).

While we’re nerding out on frame weight, here’s a list of all the other parts I put on the workshop scales;

• S-Works Epic Frame & Shock – 2,040g
• RockShox SID Flight Attendant Fork – 1,1616g
• RockShox SIDLuxe Flight Attendant Shock – 342g
• RockShox Reverb AXS Dropper Post – 617g
• S-Works Power Saddle – 161g
• Roval Control SL Cockpit – 247g
• Roval Control SL Wheelset – 1,293g
• Fast Trak Control T7 Tyre – 716g
• Renegade Control T5 Tyre – 726g

What do we dig about the Specialized Epic?

I gotta say, we are absolutely loving this new trend for 120mm travel XC bikes, and the Specialized Epic is arguably the best example yet. Its longer legs give it a significantly plusher and more active ride quality compared to the likes of the Supercaliber and Lux World Cup .

By employing a shock extender, sealed bearings can be used at all pivot points with the exception of the forward shock mount. Specialized has also spec’d a lighter lockout tune, which leads to less damping restriction in the Wide Open mode for greater bump-swallowing performance. Combined with the superb SID and SIDLuxe, you’re treated to well-balanced traction and sensitivity front to back.

Push the Epic on more challenging terrain, and its reactive suspension reveals impressive big-hit support. That big bottom-out bumper works wonders at cushioning the last few millimetres, with only the ugliest landings resulting in you hitting full travel. This gives more confidence to let it hang out on the descents, and it makes the Epic a fun and natural bike to jump with.

Future-forward geometry

The contemporary geometry plays into the Epic’s confidence too. While the aggressive position puts you low and forward in the cockpit, I’ve rarely encountered any nervousness when pointing it down a steep chute. The stout 35mm fork chassis certainly helps, as does the capable suspension and long front centre.

Things get even better when you flip the geometry chip into the Low position. This pushes the Epic further into trail bike territory by slackening the head angle to 65.9° and dropping the BB by 5mm. I measured the actual BB height as 323mm, which is quite low indeed.

With your feet hovering above the ground, stability at speed is outrageously good and you can properly bury the Epic into tight corners. Traction is plentiful, with the supple tyres and sensitive suspension keeping you thoroughly connected to the terrain.

There’s also a nice degree of springiness to the frame itself, which you can feel when slinging the Epic through successive turns. It’s worth acknowledging Specialized’s size-specific approach that sees unique carbon layups and tube profiles employed across each frame size. The idea here is to hit the same stiffness targets based on the expected average rider weight. As such, heavy folks on larger frames won’t end up on a wet noodle of a bike, and lighter riders on smaller frames won’t suffer from an excessively stiff and harsh ride.

Pert pedalling

Pedal response has also stepped up on the new Specialized Epic, offering noticeably greater efficiency compared to the previous Epic EVO.

Part of this is due to the elevated anti-squat, which sits at around 100% at sag compared to 90% for the old bike. It doesn’t sound like much, but it leads to more neutral pedalling performance that ensures the Epic is plenty responsive under power even in the Wide Open mode. Along with the welterweight carbon wheelset and quick-rolling tyres, acceleration is rapid.

It only gets better in the Magic Middle mode, which stabilises the suspension on the climbs and lifts the overall ride height. Even with the ground-hugging BB, pedal strikes have been a non-issue.

There’s still enough movement to provide grip on hardpack surfaces. And the suspension can break through its low-speed threshold when you encounter a reasonable impact, with a nice clean breakaway that does well to mitigate incoming trail feedback. This makes the Magic Middle mode ideal for most racing scenarios where efficiency is paramount and comfort is less of a concern.

Flight Attendant XC

Now I did say I didn’t want to talk too much about Flight Attendant XC, but I’m so jazzed on it that I’m finding it difficult not to.

Compared to the existing enduro version of Flight Attendant, the hardware isn’t all that different. Indeed the modules and AXS batteries are all identical, and the system still automatically adjusts the suspension between three preset damping positions. In the case of the Epic, those are Wide Open, Magic Middle and Sprint-On-Lock.

Along with the powermeter, the system records all of this information and stores data from your previous seven rides to help build a visual of the terrain and your riding style.

What is new for Flight Attendant XC is its powermeter and AXS derailleur integration. This allows the system to factor in your power output into its trail-tweaking algorithm. The idea here is that when you’re sprinting for your life the suspension is more likely to lock out. If you’re just cruising however, it’ll default to the open setting.

The modules otherwise maintain their bump sensors and pitch detection, so it knows when you’re going up or downhill, and whether the trail is smooth or bumpy. Along with the powermeter, the system records all of this information and stores data from your previous seven rides to help build a visual of the terrain and your riding style.

In use, Flight Attendant XC is an absolute game-changer. The wireless setup is super neat, removing two cables and a remote lockout from the cockpit. And with the automated suspension, there’s one less thing for you to think about so you can concentrate on the trail ahead.

There is an Override mode, which I’ve set to the Sprint-On-Lock setting to provide an instantaneous lockout at the push of a button on the Pod controller. You can also switch the system into Manual mode and use the same Pod controller button to scroll through the three suspension settings. It’s much the same as using the TwistLoc remote, though it is much faster and takes less effort.

Really though, it’s all about the Auto mode and the benefits it brings to the riding experience. I particularly like when it engages a split suspension state, where the shock moves into a firmer mode compared to the fork. This is one of the key benefits over a manually-operated system, and it means the back end of the bike rides firmer and higher to improve pedalling efficiency, while the fork remains open so it can freely absorb impacts.

It’s clever stuff, and it only gets better the more you ride it. The system learns your riding style and power zones, allowing it to make more nuanced decisions. The beauty though is in its simplicity. You just get on the bike, ride and let the suspension adjust to the terrain as needed.

Curious to know more? See our separate Flight Attendant review for the full story.

What don’t we like?

That’s easy, the price!

Honestly, $24K is an insane amount of money for a mountain bike that doesn’t have a mid-drive motor. It puts the S-Works model well out of reach for most riders, but then these have never exactly been cheap bikes.

Obviously the Flight Attendant system adds a lot to the price tag. While Flight Attendant XC is yet to be available aftermarket, RockShox sells the current enduro kit (fork, shock and pedal sensor) for $5K alone. Add a powermeter into the equation, and you’ve get a rough idea of how much extra you’re paying for the electronic integration.

And ultimately, it does lead to the S-Works Epic being the highest performing XC bike I’ve ever tested. If you want the very best, I’d honestly struggle to recommend anything else.

Most folks won’t be able to justify spending that kind of money though, and the good news is that you don’t have to. Personally I’d be looking at the Epic Expert, which at $11,000 AUD hits the sweet spot in terms of the performance-per-dollar ratio.

Its FACT 11m frame is only a little bit heavier, and it still gets a lightweight Roval Control carbon wheelset and a wireless GX AXS Transmission. More importantly, it shares the same high-end fork and shock dampers as the S-Works model. It’s also claimed to weigh just 11.1kg, making it lighter than the Trek Supercaliber 9.8 GX AXS (11.62kg), Orbea Oiz M10 (11.57kg), and the Cervelo ZFS-5 120 X0 AXS (11.52kg) we’ve tested previously.

Price aside, I’m otherwise struggling to come up with other downsides for the Epic. Some may be turned off by the headset cable routing, but it’s worth pointing out that it only features on the FACT 12m frame on the S-Works model. And with only a single brake hose passing through the headset, it’s a total non-issue. In fact, I prefer it as it provides a super clean cockpit.

I did get some creaking from the headset on our test bike, which was easy to pull apart for cleaning. Following a re-grease it’s been silent ever since. I also like the subtle steering limiter, which does its intended job without ever being noticeable on the trail.

Component highs & lows

With the Specialized S-Works Epic being the most expensive mountain bike we’ve ever tested, you’d expect it to be absolutely flawless. And for the most part that’s been the case.

The RockShox SID fork and SIDLuxe shock are superb, and in many ways this combo is leading the charge in the XC world. Specialized complements the sensitive suspension with a cohesive and well-tuned build kit. There’s no harshness from the one-piece cockpit, and there’s decent compliance from the supple tyres and carbon wheels.

Despite the incredibly low weight, the Control SL wheelset have handled some serious whacks to the rims. I had a huge stick go through the rear wheel and get jammed up against the chainstays, though aside from a bent spoke there’s been no damage to speak of.

The tyre combo has been similarly reliable, offering a good balance of grip, suppleness and durability. See our Specialized XC tyre group test for more detail about these.

One downside has been the SRAM Level Ultimate brakes. The levers feature too much dead stroke for my liking, irrespective of how many times you bleed them. Really your only option is to run the lever reach further out, or pair them with the thicker and heavier HS2 rotors like I have on my Lux World Cup .

And that’s kind of the story with the Epic as a whole, which puts a greater emphasis on performance and practicality over outright weight.

Speaking of weight, there are some areas you could drop grams. The Reverb AXS is 200g heavier than an equivalent Transfer SL , though the wireless setup is a big plus and so too is the light action and infinite adjustability. It’s the same deal with SRAM’s XX SL Transmission. Shimano XTR is lighter, but it’s hard to not be impressed by the shift quality and robustness of the hanger-less XX SL derailleur.

And that’s kind of the story with the Epic as a whole, which puts a greater emphasis on performance and practicality over outright weight. Specialized  could  have made it lighter by omitting the SWAT storage, thick frame protection, flip chip and internal guide tubes. Personally I’m glad they’re all here though, as it makes for a more versatile bike that’s easier to live with day-to-day. Speaking of versatility, I should point out that the frame will handle a 130mm travel fork, which is exactly how the Epic EVO comes set up. Check out our Epic EVO review for more.

Specialized Epic vs Epic World Cup

With the new Specialized Epic 8 joining the lineup alongside the Epic World Cup , no doubt there’ll be a number of folks trying to work out which will be the best XC bike for their needs.

Released a year ago, the Epic World Cup is a short travel full suspension race bike that represents an evolution of the previous Brain-equipped Epic. It’s built around a stunning full carbon frame with a proprietary SIDLuxe WCID shock that incorporates a tuneable negative air chamber. It’s designed to offer a very firm and almost locked out feel for maximum pedal efficiency, with a smooth breakaway that allows you to deploy the 75mm of rear travel on bigger hits.

That’s complemented by a Brain-equipped SID SL fork that offers 110mm of travel. Along with rigid carbon seatpost and smaller 2-piston brakes, the Epic World Cup is the lighter of two bikes, and by no small margin either. At a claimed 9.27kg for the S-Works model, it’s over a kilo lighter than the regular Epic. It’s also cheaper too at $19,200 AUD.

Despite coming from the same brand, on the trail these two bikes are very different.

The Epic World Cup strikes the middle ground between a hardtail and a traditional full suspension bike. It’s seriously efficient and is ideal for smoother courses and short track racing where you don’t necessarily need a plush ride. The steering is wicked fast and, much like a hardtail, it loves being whipped through tight and flowy singletrack. However, its slack head angle and low BB means it is surprisingly stable at speed, even if there is more feedback through the contact points.

In comparison, the Epic 8 is for sure the more versatile bike of the two. It’s significantly plusher and is far more comfortable over rough terrain, which sees it drawing a stronger connection with the previous Epic EVO.

It’s no slouch though, with the Magic Middle and Sprint-On-Lock modes providing plenty of pedal response when needed. The difference is that you’ll be throttling the TwistLoc remote on a regular basis to tweak the suspension to the trail, and of course the extra cables will add some clutter to the cockpit compared to the beautifully clean setup on the Epic World Cup. That is unless you’re considering the premium S-Works model with its Flight Attendant system.

Outside of racing, I’ve simply found the Epic 8 to be more fun to ride. It’s a ripping XC bike that offers remarkable capability on fast and technical terrain. It’s also the better technical climber when things get choppy, as it delivers considerably more grip and comfort. If I was to choose out of the two, hands down I’d pick the Epic 8.

Specialized Epic 8 vs Scott Spark RC

Given it’s also built around a 120mm travel platform, the Scott Spark RC is a logical competitor to the new Specialized Epic 8.

The frame design is quite different, with its highly integrated approach and hidden rear shock creating a distinctive silhouette that stands out from the crowd. It also incorporates modular headset cups for adjusting the head angle independently, but otherwise the geometry is pretty similar to the Epic.

Comparing price and specs isn’t straightforward, since at the time of writing Scott is still yet to update the Spark range with any SRAM Transmission models. However, it’s worth acknowledging that the Spark is available in a wide variety of options including models with alloy frames, which means the starting price is much lower.

As for ride quality, both the Epic and Spark are at the forefront when it comes to modern XC race bikes. They’re surprisingly plush and offer a load of traction across rough and technical terrain. Each comes with a nifty 3-position damper for the fork and shock, with a middle setting that’s designed to elevate pedalling efficiency and climbing performance.

The Spark goes about it differently with its proprietary Nude shock, which limits rear travel to 80mm in the middle Traction Control mode. It also features the unique TwinLoc remote that incorporates the dropper lever and suspension paddles into a single unit. It’s all very neat and works well, with the integrated cockpit and internal shock giving it a sharp aesthetic that will appeal to certain riders.

The Epic takes a less radical approach with its external shock, guided cable routing and threaded BB making it an easier bike to work on. Its slimmer and more conventional frame profile also provides a greater degree of compliance when riding over rocky terrain, while the SWAT downtube storage gives it another tick in the practicality department.

Flow’s Verdict

No doubt about it, the new Specialized Epic 8 is up there as one of the most fun and versatile XC bikes I’ve ever tested.

In the past, race bikes have always been sharp, efficient and very business-like machines. But having ditched the Brain and boosted its travel, it’s clear the Epic 8 is far more than just a dedicated racer.

Yes it’s light and fast, and it can deliver powerful responsiveness when needed thanks to its svelte carbon frame, neutral pedalling behaviour and clever shock tune. Flip the suspension into the Wide Open mode, and you’ve got a plush and active ride quality. Combined with its well-balanced handling, it offers a calmness at speed that allows you to push it surprisingly hard on technical terrain.

This is important because while races have traditionally been won or lost on the climbs, these days they’re increasingly being decided on the downhills too. And the Epic 8 is a seriously good descender.

Along with its relatively straightforward frame layout and practical amenities, it’s a versatile and pragmatic bike to live with day-to-day. If I was choosing the ultimate XC bike, I’d be hard-pressed to think of anything as capable as this.

ABOUT THE REVIEWER - Wil Barrett

Bendigo, Victoria

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• Pekhorka Park
• Saturn Stadium
• Orekhovo Zuevsky City Exhibition Hall
• Noginsk Museum and Exhibition Center

Based on frame geometry and build specs.

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Epic World Cup Expert

Supercaliber SLR 9.8 GX AXS Gen 2

(descending)

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.