Supercaliber SL 9.7 GX AXS T-Type Gen 2

Trek’s second-generation Supercaliber is a highly focused cross-country race bike designed to bridge the gap between a hardtail and a traditional full-suspension platform. Built around the signature frame-integrated IsoStrut suspension layout, the Gen 2 platform evolves to meet the demands of modern World Cup courses. Rear travel increases to 80 millimeters, paired with a 110-millimeter fork on stock builds, giving the bike a broader capability profile without dulling its pedaling response. For this generation, Trek partnered with RockShox to redesign the IsoStrut unit, aiming for improved sensitivity and easier serviceability. The platform also splits into two distinct carbon frame tiers: the standard SL and the lighter SLR, which omits internal cable guide tubes to shed weight. It remains an uncompromising tool for dedicated racers who prioritize efficiency and speed above all else.

$6,250Closeout; multiple prices shownGen Gen 2
Trek Supercaliber SL 9.7 GX AXS T-Type Gen 2
Build
Size
Stack590mm
Reach450mm
Top tube605mm
Headtube length90mm
Standover height772mm
Seat tube length440mm

Fit and geometry

The Gen 2 geometry shifts toward stability without losing its aggressive cross-country posture. Trek slackened the head tube angle to 67.5 degrees and extended the reach, pushing the front center outward to calm the steering at high speeds. To offset the deeper sag of the increased rear travel, the bottom bracket sits slightly higher than the previous generation, which helps maintain ground clearance and reduces pedal strikes on technical climbs.

Despite the longer wheelbase, the bike requires deliberate front-wheel weighting to maintain traction in flat corners. Rider positioning is stretched and low, emphasizing power output. On SLR models, the cockpit features a one-piece Bontrager carbon bar and stem. While this setup saves weight and increases steering stiffness, it prevents riders from adjusting handlebar roll, which may frustrate those with specific ergonomic preferences. To aid descending control, Trek now includes a dropper post as standard equipment across the entire size run, allowing riders to lower their center of gravity and maneuver more freely when the trail points down.

Full specs

Frameset

Frame

SL OCLV Mountain Carbon frame, IsoStrut, UDH, 80mm travel

Fork

RockShox SID, DebonAir spring, Rush RL damper, remote lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 110mm travel

Rear shock

Trek IsoStrut w/ RockShox SIDLuxe, 2-position remote damper

Weight

11.88 kg / 26.2 lb (size M, with TLR sealant, no tubes)

Groupset

Shift levers

SRAM AXS Pod

Rear derailleur

SRAM GX Eagle AXS, T-Type

Cassette

SRAM Eagle XS-1275, T-Type, 10-52T, 12-speed

Chain

SRAM GX Eagle, T-Type, 12-speed

Crankset

SRAM GX Eagle, DUB, T-Type, 34T, 55mm chainline — 170mm (S/M/ML) or 175mm (L/XL)

Bottom bracket

SRAM DUB, 92mm, PressFit

Front brake

SRAM Level Bronze 4-piston hydraulic disc

Rear brake

SRAM Level Bronze 4-piston hydraulic disc

Front rotor

SRAM CenterLine, 6-bolt, Round Edge — 160mm (all sizes)

Rear rotor

SRAM CenterLine, 6-bolt, Round Edge — 180mm (all sizes)

Wheelset

Front wheel

Bontrager Kovee Comp 25, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29"

Rear wheel

Bontrager Kovee Comp 25, Tubeless Ready, Rapid Drive 108, Boost148, 12mm thru axle, 29"

Front tire

Pirelli Scorpion XC RC, Tubeless Ready, Team Edition Pro Wall, aramid bead, 120 tpi, 29x2.40"

Rear tire

Pirelli Scorpion XC RC, Tubeless Ready, Team Edition Pro Wall, aramid bead, 120 tpi, 29x2.40"

Cockpit

Stem

Bontrager Elite, 35mm clamp, 13° — 60mm (S/M), 70mm (ML), 80mm (L), 90mm (XL)

Handlebars

Bontrager Kovee Pro OCLV Carbon, 35mm, 5mm rise, 720mm (S) OR Bontrager Line Pro OCLV Carbon, 35mm, 15mm rise, 750mm (M/ML/L/XL)

Saddle

Bontrager Verse Short Elite, hollow magnesium rails, 145mm width

Seatpost

Bontrager Line Dropper, internal routing, 31.6mm, MaxFlow — 100mm travel/310mm length (S); 150mm travel/410mm length (M/ML/L); 170mm travel/450mm length (XL)

Builds

The Supercaliber lineup is divided by its two frame tiers. The SL models serve as the entry point, utilizing a slightly heavier carbon layup but featuring molded-in guide tubes that simplify cable maintenance. The premium SLR models shed weight by using higher-modulus carbon and omitting those internal tubes, catering directly to weight-conscious racers.

Mid-range builds equipped with SRAM GX Eagle Transmission are widely considered the value sweet spot, offering robust electronic shifting under load despite a slight weight penalty compared to top-tier groupsets. At the high end, the flagship SLR 9.9 models feature premium RockShox Flight Attendant or Fox Factory suspension, carbon wheels, and SRAM XX or Shimano XTR drivetrains.

A notable spec variation occurs with the tires. While most of the range ships with high-volume 2.4-inch tires that complement the bike's descending capabilities, the absolute lightest flagship builds are specced with narrower 2.2-inch tires to maximize weight savings. Riders frequently swap these out for wider rubber to improve cornering grip and braking traction on loose courses.

Reviews

Reviewers consistently praise the Supercaliber for its exceptional pedaling response and climbing speed. The high anti-squat kinematics and structural rigidity of the IsoStrut design translate power immediately, delivering an "ego boosting pedal response" (Mountain Bike Rider) that excels on steep pitches and sprints. While the suspension is highly effective under power, multiple testers noted that the RockShox-made IsoStrut requires a bedding-in period. Out of the box, the rear end can feel harsh until the seals and bushings loosen up, sometimes requiring additional lubrication to achieve its intended sensitivity.

Once broken in, the suspension provides excellent seated traction and feels "taut and reactive" (BikeRadar) over trail chatter, though it remains a firm race tune. On descents, the updated platform is noticeably more stable than its predecessor. The chassis rigidity translates to "pinpoint magic" (Feedthehabit) in smooth corners, allowing riders to hold tight lines with minimal steering lag. However, testers caution that the short travel limit is still apparent on rougher terrain. Pushing the bike into chunky rock gardens or flat landings can result in a harsh bottom-out. Ultimately, reviewers agree that the bike retains its "ruthless efficiency" (Flow Mountain Bike), rewarding aggressive, precise riders while feeling unforgiving if the pace drops or the trail becomes excessively rowdy.

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