Trek Supercaliber SLR 9.8 XO AXS Gen 2 – Carbon Smoke / Galactic Grey Marble | World Cup XC Performance in a Striking Finish

When you are choosing a cross-country race bike at this level, every detail matters — the weight of the frame, the precision of the drivetrain, the efficiency of the suspension, and yes, even the finish. The Trek Supercaliber SLR 9.8 XO AXS T-Type Gen 2 in Carbon Smoke / Galactic Grey Marble is a bike that delivers on every one of those counts. This is an ultra-light, full-carbon XC machine built from Trek’s highest-grade mountain carbon, fitted with a completely wireless SRAM X0 AXS T-Type drivetrain, race-tuned dual-suspension, and a full carbon cockpit and wheels — and presented in one of the most distinctive colourways in Trek’s current lineup.

Carbon Smoke is a deep, raw carbon-look finish that shimmers with subtle colour movement in different light conditions, paired with a Galactic Grey Marble graphic accent that adds depth and character without disrupting the overall clean race aesthetic. This is a bike that is built for the podium and looks like it.

The Medium/Large size hits the sweet spot for a wide range of riders, offering Trek’s modern XC geometry with the reach, stack, and stand-over optimised for riders who want a responsive, aggressive fit without sacrificing all-day comfort on longer race efforts.

SLR OCLV Mountain Carbon — Trek’s Lightest Mountain Frame Material

The SLR in Supercaliber SLR stands for Super Light Race, and it tells you everything you need to know about Trek’s intent with this frame. The SLR OCLV Mountain Carbon uses a higher-modulus carbon fibre lay-up than the standard SL grade, allowing Trek’s engineers to use less material while achieving greater stiffness. Internally, guide tubes for cable and hose routing have been eliminated entirely — a deliberate weight-saving decision that strips every unnecessary gram from the frame structure. The result is a frame that sits at the competitive ceiling for what is considered raceable weight in elite XC competition.

The Gen 2 frame introduces a significantly slacker 67.5-degree head angle than the original Supercaliber, reflecting the reality of modern XC race courses that are longer, rougher, and more technically demanding. Reach and seat angle have been marginally increased for a more natural, powerful riding position, and bottom bracket height has been raised 10mm to improve anti-squat behaviour under pedalling load. Taken together, these geometry updates make the Supercaliber SLR a more confident, more capable bike across a wider range of terrain — without compromising any of its legendary climbing efficiency.

Two carbon bottle cages are included as standard, an essential practical detail for longer race stages and epic training rides where hydration on the go matters.

IsoStrut Rear Suspension — 80mm of Pivotless Race-Day Efficiency

The Supercaliber SLR 9.8 XO AXS uses Trek’s Gen 2 IsoStrut rear suspension system, which remains one of the most innovative and effective rear suspension concepts in the XC market. Rather than relying on a conventional pivot-and-linkage rear triangle, IsoStrut connects the mainframe directly to the pivotless seat stays through an integrated RockShox SIDLuxe shock that is housed within the IsoStrut tube itself. The seat stays flex actively to deliver approximately 80mm of rear wheel travel without any of the lateral compliance, added weight, or maintenance complexity associated with traditional linkage systems.

The two-position remote lockout damper is operated at the handlebar, letting riders transition instantly between active suspension for rough terrain and a firm, locked platform for efficient climbing or smooth road sections — without breaking riding position or losing momentum. Trek’s own performance research has confirmed that the Gen 2 Supercaliber IsoStrut system is more efficient than a comparable hardtail under pedalling load — a result that continues to set the Supercaliber SLR apart from every other XC full-suspension bike on the market.

RockShox SID Select+ Fork — 110mm Race-Day Front Suspension

At the front, the Supercaliber SLR 9.8 XO AXS is equipped with the RockShox SID Select+ fork, offering 110mm of travel matched perfectly to the IsoStrut rear. The SID Select+ features a DebonAir spring for a smooth, progressive feel from the very first millimetre of stroke, and the Charger Race Day damper delivers fast, consistent, low-friction damping tuned specifically for the high-speed, high-frequency impacts of XC racing. A dual remote lockout system — operated independently from the rear shock remote — gives riders complete, instant control over their suspension platform at all times. The 15mm Maxle Stealth thru-axle provides secure, rattle-free wheel retention and precise front-end steering accuracy throughout.

SRAM X0 AXS T-Type Wireless Electronic Transmission

Shifting is handled by SRAM’s X0 AXS T-Type 12-speed fully wireless electronic transmission — one of the most capable and reliable wireless drivetrains available in mountain biking today. The direct-mount T-Type derailleur interface is derived from SRAM’s top-of-range XX AXS system, eliminating the conventional B-tension screw and cage mount in favour of a cleaner, more precise mounting arrangement that maintains perfect chain tension and alignment across the full cassette range, even on rough terrain. There are no cables to stretch, no mechanical adjustments required between rides, and no missed shifts under load — the X0 AXS transmits gear changes instantly and precisely at every single press of the wireless lever.

SRAM’s AXS ecosystem also allows riders to customise shift maps and monitor battery status via the AXS app, giving an additional layer of control and race-day confidence that is unavailable on any mechanical drivetrain at any price point.

Bontrager Kovee Elite 30 Carbon Wheels and Full Carbon Cockpit

The Supercaliber SLR 9.8 XO AXS rolls on Bontrager Kovee Elite 30 OCLV Mountain Carbon wheels — a 30mm internal width, tubeless-ready carbon wheelset with Rapid Drive 108 engagement at the rear for near-instant power transfer the moment you begin pedalling. These are lightweight, stiff, and durable wheels that provide a genuinely noticeable performance advantage over alloy alternatives in terms of weight, stiffness, and ride quality.

The cockpit is the Bontrager RSL Integrated handlebar and stem in OCLV Carbon — a one-piece, weight-optimised unit that eliminates the interface between stem and bar, saving weight and reducing aerodynamic drag at the front of the bike. For the ML size specifically, the RSL stem runs an 80mm virtual length, providing a reach optimised for the Medium/Large frame geometry. SRAM Level Silver 4-piston hydraulic disc brakes complete the package with powerful, consistent, all-conditions stopping performance.

5 Reasons to Buy the Trek Supercaliber SLR 9.8 XO AXS Gen 2 – Carbon Smoke / Galactic Grey Marble

1. The SLR OCLV Mountain Carbon frame — Trek’s highest-grade mountain carbon — eliminates internal routing guide tubes and uses a high-modulus lay-up to achieve race-competitive weight without sacrificing stiffness or responsiveness.
2. Gen 2 IsoStrut pivotless rear suspension delivers 80mm of tunable, efficient travel that Trek’s own research confirms outperforms a comparable hardtail for pedalling efficiency — the defining competitive advantage of the Supercaliber platform.
3. The SRAM X0 AXS T-Type wireless electronic drivetrain provides instant, cable-free gear changes with direct-mount T-Type precision — no stretching, no missed shifts, and full customisability via the AXS app.
4. Bontrager Kovee Elite 30 OCLV Carbon wheels and a full Bontrager RSL Integrated carbon cockpit mean every contact point on this bike is carbon — minimising weight and maximising stiffness and response from wheels to hands.
5. The Carbon Smoke / Galactic Grey Marble colourway is one of Trek’s most sophisticated and visually striking finishes — a raw carbon-look base with marble-effect detailing that sets this bike apart on any start line.

Learn more about Trek here: https://www.trekbikes.com

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