Trek Supercaliber SLR 9.8 GX AXS Gen 2

The Trek Supercaliber SLR 9.8 GX AXS Gen 2 is a purpose-built cross-country race machine designed for riders who demand podium-ready performance from a full-suspension platform that weighs barely more than a hardtail. Built around Trek’s proprietary SLR OCLV Mountain Carbon frame with the innovative IsoStrut integrated suspension system, this is the bike that World Cup XC racers trust when every second counts.

Who Is the Supercaliber SLR 9.8 GX AXS Gen 2 Built For?

The Trek Supercaliber SLR 9.8 GX AXS Gen 2 is built for competitive and performance-focused cross-country mountain bikers, from seasoned club racers to elite athletes chasing results on demanding XC circuits. It suits riders who need a fast, efficient, and technically capable bike on hardpacked singletrack, rocky XC trails, and World Cup-style race courses where climbing speed and descending confidence both matter equally.

Trek Supercaliber SLR 9.8 GX AXS Gen 2: Race-Bred Performance on Every Trail

At the heart of the Trek Supercaliber SLR 9.8 GX AXS Gen 2 is Trek’s exclusive IsoStrut suspension design, a system that integrates the shock body directly into the SLR OCLV Mountain Carbon frame rather than using a conventional linkage. The result is a bike that delivers 80mm of rear travel and 110mm of front travel through the RockShox SID fork, providing far more capability than the previous generation while adding minimal weight. The pivotless carbon seatstays actively flex to absorb trail chatter, keeping traction high on rough terrain without the energy losses of a conventional rear pivot. This is precisely what makes the Supercaliber such a compelling race tool: you get the pounding efficiency of a hardtail and the control of a full-suspension bike, all from one exceptionally light platform.

The SRAM GX Eagle AXS T-Type drivetrain runs completely wireless across its 12-speed, 10-52T cassette, giving you instant, precise gear changes without cables to snag, ice up, or stretch. The SRAM Eagle AXS POD controller keeps shifting intuitive and ergonomic, while the T-Type system eliminates chain drop thanks to its tightly integrated transmission design. Combined with the SRAM Level Bronze 4-piston hydraulic disc brakes, riders have consistent, modulated stopping power in all conditions, whether finishing a steep technical descent or scrubbing speed into a loose corner. The geometry on the Gen 2 Supercaliber has been updated with a longer reach and a slacker 67.5-degree head tube angle, making it noticeably more stable at speed while retaining the snappy climbing agility that XC racing demands. Riders searching for the best in cross-country performance will find the full Enduroplanet range of mountain bikes worth exploring alongside this machine.

Bontrager Kovee Elite 30 OCLV Mountain Carbon wheels roll on new Bontrager Sainte-Anne RSL XR 2.4in tyres, which feature a 220tpi lightweight casing, dual-compound rubber, and a side-knob pattern designed to grip hard in corners without creating unnecessary rolling resistance on the climbs. The Bontrager RSL one-piece integrated carbon handlebar and stem saves weight while cleaning up the front end, and the size-specific Bontrager Line Dropper post is fitted as standard, a feature that was not common on XC bikes just a few years ago. Being able to drop the saddle for technical descents dramatically increases confidence and bike control, making the Supercaliber SLR 9.8 GX AXS Gen 2 a far more versatile race bike than traditional XC geometry would suggest. As noted in the in-depth review by the team at Flow Mountain Bike, the Gen 2 Supercaliber is a striking and deadly efficient short-travel XC race bike that has grown up significantly without compromising its signature speed.

5 Reasons You’ll Want the Trek Supercaliber SLR 9.8 GX AXS Gen 2

• IsoStrut integrated suspension for real efficiency gains: Trek’s exclusive IsoStrut system combines 80mm of damped rear travel directly into the carbon frame, delivering full suspension control with a weight and stiffness profile that rivals a hardtail on every climb.
• Wireless SRAM GX Eagle AXS T-Type shifting: The fully wireless 12-speed drivetrain delivers seamless, cable-free gear changes across a wide 520% range, so you are always in the right gear whether attacking a steep climb or surging out of a corner.
• Updated Gen 2 geometry for greater descending confidence: A longer reach and slacker 67.5-degree head tube angle give the Supercaliber noticeably more stability at speed on technical descents, without robbing the climbing sharpness that XC racing depends on.
• Bontrager Kovee Elite 30 carbon wheels and Sainte-Anne tyres: The lightweight OCLV carbon rims paired with the new 2.4in 220tpi Sainte-Anne tyres offer an ideal balance of rolling speed, traction, and tubeless-ready reliability across hardpacked and loose XC terrain.
• Size-specific dropper post fitted as standard: The Bontrager Line Dropper post with up to 150mm of travel is included as standard equipment, giving you the saddle control needed to ride more confidently on the descents that increasingly define modern XC race courses.