Carbon full-suspension mountain bike Trek Supercaliber SLR 9.9 XX Flight Attendant red: climber, 10.28 kg

Trek Supercaliber SLR 9.9 XX Flight Attendant Red Smoke: a featherweight for climbers

At 10.28 kg in size M, the Trek Supercaliber SLR 9.9 XX Flight Attendant Gen 2 is the lightest full-suspension bike in Trek's XC catalogue. An OCLV Mountain SLR frame, Kovee RSL carbon wheels, a SRAM XX SL AXS 10-52 drivetrain and Motive Ultimate brakes make up a machine designed for climbing. The Red Smoke/Drizzle colourway lays down an intense smoky red, speckled with fine lighter droplets like drizzle.

Technical specifications

Who is it for?

For the climber who judges a mountain bike first by how it goes uphill, whether in MTB hill climbs, on routes with lots of elevation gain or on long ascents up the tracks of the Montagne Noire. It will also appeal to the lightweight racer who wants a lively, precise bike without an ounce of excess weight.

The LVR workshop view

OCLV carbon, Trek's signature. Since 1992, Trek has heat-pressed its fibre sheets to eliminate the air pockets that weaken a frame. The OCLV Mountain version is calibrated for off-road use: it has to withstand rock strikes and crashes, not just be stiff. On this flagship, it is the SLR version, the lightest in Trek's mountain bike catalogue, that forms the frame; it remains covered by Trek's lifetime warranty.

In short: the 9.9 XX Flight Attendant does not change frame compared with the other SLRs; it brings together the very best Trek does around it: XX SL drivetrain, Motive Ultimate brakes, carbon wheels and electronic suspension. The result is the lightest Supercaliber in the range, 300 g under the 9.9 XTR Di2.

Every gram saved is felt above all when accelerating on climbs: Kovee RSL wheels, an XX SL chainset and an Aeolus RSL saddle with carbon rails lighten the moving masses. The 34-tooth chainring paired with the 52 at the rear leaves low enough gearing to get up the steepest ramps without breaking your cadence.

On climbs, Flight Attendant firms up the suspension as soon as you push hard on the pedals, then frees it over rocky sections to maintain traction. The 4-piston Motive Ultimate brakes provide reassuring power for fast descents, with a 180 mm rotor at the front.

Which Supercaliber should you choose?

Our take: 300 g lighter than the 9.9 XTR Di2 and 1.1 kg lighter than the 9.8 X0 AXS, this is the climber's choice. For anyone who prefers conventional suspension with manual lockout, the 9.9 XTR Di2 comes in at 10.58 kg.

Your questions

Why buy from LVR Cycles? As a Trek dealer in Béziers, we tailor your gearing, set up the automated suspension and service your Supercaliber throughout the race season.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.