The Trek Fuel EX 9.9 X0 AXS Gen 7 2027 is the top of the Fuel EX range — an OCLV Mountain Carbon frame paired with SRAM's wireless X0 Eagle AXS drivetrain and a RockShox Lyrik Ultimate fork. This is the version built for riders who want the very best the platform offers, no compromises.
WHO THIS BIKE SUITS
- You want the lightest, stiffest Fuel EX frame available — full carbon, not a mix.
- You want SRAM's wireless AXS shifting — no cables to route, no cable stretch to adjust.
- You're riding technical, demanding trails where every component matters.
- You want SRAM Maven Silver brakes — some of the strongest stopping power available on a trail bike.
IF YOU'RE LOOKING FOR SOMETHING DIFFERENT
If carbon and wireless shifting isn't worth the premium to you, the Fuel EX 9.8 XT gets you the same frame and suspension performance with Shimano mechanical shifting for considerably less.
If you want e-assist for bigger days, the Fuel+ EX carries the same trail-bike character with a motor on board.
WHERE IT SITS IN THE RANGE
The Fuel EX 9.9 sits at the very top of the range — full carbon frame, RockShox Lyrik Ultimate fork, and SRAM's flagship wireless Eagle AXS T-Type drivetrain. This is the specification Trek builds when cost isn't the constraint.
Same tier, other Fuel platforms: Fuel LX 9.9 X0 AXS — Fuel MX 9.9 X0 AXS
HOW IT RIDES
Suspension
RockShox Lyrik Ultimate up front with DebonAir+ and ButterCups, paired with a matched RockShox rear shock — genuinely capable, adjustable suspension that rewards set-up time.
Drivetrain
SRAM X0 Eagle AXS T-Type shifts wirelessly and consistently, even under load — no barrel adjusters, no cable stretch.
Brakes
SRAM Maven Silver four-piston brakes are built for control on steep, sustained descents.
THE FINAL WORD
The Trek Fuel EX 9.9 X0 AXS is for riders who know exactly what they want and are ready to pay for the best version of it. Come in and talk to us if you're weighing this against the 9.8 XT — the difference is real, but so is the price gap.
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.
Frame: OCLV Mountain Carbon, internal storage, adjustable leverage rate, BSA 73, Boost148, 145 mm-160 mm adaptable travel
Headset: (not published by Trek at this spec tier)
Bottom bracket: SRAM DUB MTB Wide, 73 mm, BSA threaded
Fork: RockShox Lyrik Ultimate, DebonAir+ w/ ButterCups, Charger 3.1 RC damper, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 150 mm travel
Rear shock: RockShox Deluxe Ultimate RC2T, 205 mm x 60 mm
Rear derailleur: SRAM X0 Eagle AXS, T-Type
Crank: SRAM X0 Eagle, DUB, 30T steel, T-Type, 55 mm chainline, 165-170 mm length
Cassette: SRAM Eagle XS-1295, T-Type, 10-52, 12-speed
Chain: SRAM X0 Eagle, T-Type, 12-speed
Brakeset: SRAM Maven Silver, 4-piston hydraulic disc
Front rotor: SRAM HS2, 6-bolt, 180 mm
Rear rotor: SRAM HS2, 6-bolt, 200 mm
Rims: Bontrager Line Pro, Tubeless-Ready, Presta valve
Front hub: Bontrager, sealed bearing, Boost110, 15 mm thru axle
Rear hub: Bontrager, Rapid Drive 108 freehub, Boost148, 12 mm thru axle, XD driver (SRAM)
Front tyre: Maxxis Minion DHF, 3C MAXXGRIP, EXO+ casing, folding bead, 29x2.5"
Rear tyre (M/L/XL/XXL): Maxxis Minion DHR II, 3C MAXXTERRA, EXO+ casing, folding bead, 29x2.5"
Rear tyre (S only): Maxxis Minion DHR II, 3C MAXXTERRA, EXO+ casing, folding bead, 27.5x2.5" (size S only — mixed-wheel/"mullet" setup)
Handlebar: Race Face ERA, carbon, 35 mm, 27.5 mm rise, 800 mm width
Stem: Race Face Turbine R, 35 mm, 0-degree, 40 mm length
Grips: Trek Line Elite, lock-on
Saddle: Trek Aeolus Pro, carbon fibre rails, AirLoom lattice, 145 mm width
Seatpost: RockShox Reverb AXS, wireless, 34.9 mm — 150 mm travel (S), 175 mm travel (M), 200 mm travel (L/XL/XXL)
Personalised Bike Consultation
Not sure which model is perfect for you? Our expert team at All Ride Now in Midhurst, West Sussex is here to help you choose with confidence.
- Will you be riding mainly on or off-road?
- Do you prefer an upright or sportier riding position?
- Are you looking for longer range, lighter weight, or a more comfortable feel?
Through a friendly consultation – in-store, by phone, live chat or email – we’ll help you narrow down your options and find the bike that best fits your needs.
