2025 Trek Supercaliber SLR 9.9 Flight Attendant Gen 2
Supercaliber SLR 9.9 Flight Attendant Gen 2 is an ultralight XC mountain bike built with the top components for race day. Its SLR Mountain Carbon frame is as light as it is meticulous, with a high modulus lay-up that gives you all the stiffness you crave and none of the weight. It’s equipped with a 110 mm fork and 80 mm IsoStrut shock with Flight Attendant tech that delivers free speed with non-stop suspension adjustments as you ride. It's all topped off with carbon wheels, a carbon cockpit and SRAM's lightest wireless direct-mount transmission.
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OVERVIEW
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SPECS
It's right for you if...
You. Need. Speed. You want the lightest and fastest cross-country race bike you can find, with tech that’s been proven on the world stage. You want to sprint up climbs and hammer to the finish, and let your bike do the thinking for you with 110 mm front and 80 mm of IsoStrut rear suspension with RockShox Flight Attendant. From wheels to cockpit, you crave carbon and you want the most meticulous high-mod carbon lay-up we offer on a mountain bike.
The tech you get
A featherweight, high-modulus SLR OCLV Mountain Carbon frame with modern XC geometry. 110 mm of front suspension from a RockShox SID SL Ultimate fork with DebonAir spring and Charger Race Day damper, and 80mm of IsoStrut rear suspension from a RockShox SIDLuxe shock – all with Flight Attendant tech. An ultralight, fully wireless SRAM XX SL AXS 12-speed electronic transmission, Bontrager Kovee RSL carbon wheels, carbon Bontrager RSL Integrated bar/stem combo, RockShox Reverb AXS wireless dropper post and SRAM Level Ultimate 4-piston hydraulic disc brakes.
The final word
The Supercaliber SLR 9.9 Flight Attendant Gen 2 is bred for racing and comes from a pedigree of champions. You get our top carbon XC full-suspension frame dripping with carbon components and SRAM’s lightest fully-wireless groupset, and RockShox Flight Attendant suspension that automatically adjusts to how and where you’re riding, so you can gain free speed.
Why you'll love it
You get a 110 mm fork and 80 mm of IsoStrut rear suspension with RockShox Flight Attendant that partners with slacker, capable geometry for handling the roots and rocks of modern XC courses
You don't have to compromise stiffness for weight savings thanks to the SLR OCLV Mountain Carbon frame that's intensely light, stiff and responsive
IsoStrut gives you tunable, damped suspension without missing out on efficiency for hammering up climbs at top speed
Pivotless seat stays save on weight and actively bend to help soak up trail chatter
Cream-of-the-crop components, like a RockShox SID Ultimate fork with Flight Attendant and fully wireless direct-mount SRAM XX SL AXS transmission, give you the performance advantage
*Please note – spec applies to all sizes unless listed separately
Frameset
Frame SLR OCLV Mountain Carbon, IsoStrut, UDH, 80 mm travel
Fork RockShox SID SL Ultimate, Flight Attendant Race Day damper, Stealth DebonAir spring, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 110 mm travel
Shock Trek IsoStrut, RockShox SIDLuxe, Flight Attendant RL3 damper
Max compatible fork travel 120mm, min 100mm
Wheels
Wheel front Bontrager Kovee RSL, OCLV Mountain Carbon, Tubeless Ready, CentreLock, Boost110, 15 mm thru axle, 29"
Wheel rear Bontrager Kovee RSL, OCLV Mountain Carbon, Tubeless Ready, CentreLock, Boost148, 12 mm thru axle, 29"
Skewer rear Bontrager Switch thru axle, removable lever
Tyre Pirelli Scorpion XC, Tubeless-Ready, Team Edition Pro Wall, aramid bead, 120 tpi, 29x2.20"
Tyre part Bontrager TLR sealant, 180 ml/6 oz
Rim strip Bontrager TLR
Max tyre size Frame: 29x2.40", Fork: See manufacturer
E-system
Battery SRAM eTap battery pack (with charger)
Drivetrain
Rear derailleur SRAM XX SL Eagle AXS, T-Type
*Crank Size: S, M
SRAM XX SL, Flight Attendant, DUB Wide, 34T alloy ring, 55 mm chainline, 170 mm length
Size: ML, L, XL
SRAM XX SL, Flight Attendant, DUB Wide, 34T alloy ring, 55 mm chainline, 175 mm length
Bottom bracket SRAM DUB, 92 mm, PressFit
Cassette SRAM Eagle XS-1299, T-Type, 10-52, 12-speed
Chain SRAM XX Eagle, T-Type, 12-speed
Max. chainring size 1x: 38T, min 30T
Components
Saddle Aeolus RSL, carbon rails, 145 mm width
*Seatpost Size: S
RockShox Reverb AXS, 100 mm travel, wireless, 31.6 mm, 340 mm length
Size: M, ML, L, XL
RockShox Reverb AXS, 150 mm travel, wireless, 31.6 mm, 440 mm length
*Handlebar/stem (integrated) Size: S, M, ML
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 0 mm handlebar rise, 750 mm width, -13-degree stem rise, 70 mm length
Size: L
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 0 mm handlebar rise, 750 mm width, -13-degree stem rise, 80 mm length
Size: XL
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 0 mm handlebar rise, 750 mm width, -13-degree stem rise, 90 mm length
Grips ESI Chunky
Head set FSA IS-2, 1-1/8" top, 1.5" bottom
Brake SRAM Level Ultimate 4-piston hydraulic disc
Brake rotor SRAM CentreLine X, CentreLock, round edge, 160 mm
Rotor size Max brake rotor sizes - Frame: 160mm, Fork: see fork manufacturer
Weight
Weight M - 10.11 kg / 22.29 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
Shipping
We aim to have each order fulfilled and shipped within 3-5 working days after your order being paid.
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Delivery
Shop online at biket and choose between 2 convenient delivery options.
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Refunds
Please note we do not offer straight refunds, these are issued as store credits only.
WHO ARE WE
Biket is one of South Africas Top Online Cycling Stores, based in Hillcrest, KZN.
We offer a range of the highest quality cycling products from Trek bikes, Giant bikes, Scott bikes, Bontrager & Oakley apparel, and a full service centre. Our aim is to offer the highest quality cycling products paired with the best advice.
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