Top Fuel 9.9 XX1 AXS is our top-of-the-line full suspension carbon mountain bike for endurance racers and multi-discipline riders. This down-country rig is built with the latest in fully wireless components like the SRAM XX1 Eagle AXS drivetrain and RockShox Reverb AXS dropper. It's also spec'd with high-end RockShox suspension and lots of carbon—including the wheels, bars, and shift levers. You'll fly through singletrack and rip descents on this bike, but it really shines when pushed to its full potential during grueling endurance races.
It's right for you if...
You've set your sights on endurance racing, and want every lightweight and performance advantage. You're looking for an efficient yet trail-capable rig that's fast on flats, soaks up rough terrain, and has the latest in fully wireless electronic components.
The tech you get
A full OCLV Mountain Carbon frame, top-of-the-line 120mm RockShox Pike Ultimate fork with plush DebonAir spring and Charger 2 RC2 damper that gives you more adjustment and control. 115mm of rear travel with a RockShox Deluxe Ultimate shock, and a fully wireless 1x12 SRAM XX1 Eagle AXS electronic drivetrain. Plus, wide carbon Bontrager Kovee Pro 30 wheels with a 108-tooth Rapid Drive hub for instant engagement, TwistLoc dual remote suspension lockout, a wireless RockShox Reverb AXS dropper, Bontrager Kovee XXX OCLV Carbon handlebars, and SRAM Level Ultimate brakes with carbon levers.
The final word
The Top Fuel 9.9 XX1 AXS is built for speed and capability on any terrain, but its efficient, short-travel design excels in endurance events. An OCLV Mountain Carbon frame, fully wireless drivetrain and dropper, and top-of-the-line suspension come together for a nimble and insanely fun ride at any distance.
Why you'll love it
- The SRAM XX1 Eagle AXS drivetrain is smart, smooth, and completely wireless
- It’s the ultimate endurance race bike—light, capable, and trimmed with high-performance components
- TwistLoc simultaneously locks out front and rear shocks for climbs and sprints with the simple Grip Shift-like motion
- This short-travel trail bike gives you a suspension setup that’s capable in several MTB disciplines, and especially suited to endurance events
- Make it yours: it's fully customizable through Project One
A dropper seatpost allows you to quickly lower and raise your seat to give you an ideal riding position. Dropping your seat creates a lower center of gravity for better control and maneuverability on steep descents, while raising it puts you at normal riding height for efficient pedaling.
Construction can include either hydraulic- or cable-actuated systems and the post’s travel can either be infinitely adjustable or stopped at set intervals, depending on the model.
Dropper seatposts come in standard lengths and diameters and vary by the amount of travel.
Pedals sold separately
|Frame||OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel|
|Fork||RockShox Pike Ultimate, DebonAir spring, Charger 2 RC2 damper, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 120mm travel|
|Headset||Knock Block Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom|
|Rear Shock||RockShox Deluxe Ultimate, TwistLoc remote lockout|
Front: Boost 110
Rear: Boost 148
|Rims/Wheels||Bontrager Kovee Pro 30 carbon, Tubeless Ready, 6-bolt|
|Tires||Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40"|
|Crankset||SRAM XX1 Eagle AXS Carbon, DUB, Boost|
|Bottom Bracket||SRAM DUB, 92mm, PressFit|
|Chain||SRAM XX1 Eagle, 12 speed|
|Rear Derailleur||SRAM XX1 Eagle AXS|
|Cassette/Rear Cogs||SRAM XG-1299 Eagle, 10-50, 12 speed|
|Shifters||SRAM Eagle AXS, wireless, 12 speed|
|Handlebars||Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise|
|Stem||Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree|
|Brakes||SRAM Level Ultimate hydraulic disc, carbon levers, 160mm rotors|
|Saddle||Bontrager Montrose Elite, titanium rails|
|Seat Post||RockShox Reverb AXS, wireless, 31.6mm|
* Subject to change without notice.
Trek Top Fuel
|Matte Carbon/Gloss Trek Black / Small||601842151860||588411||TOP41467737K|
|Matte Carbon/Gloss Trek Black / Medium||601842151891||588412||TOP41916503K|
|Matte Carbon/Gloss Trek Black / Medium/Large||601842151877||588413||TOP42457795K|
|Matte Carbon/Gloss Trek Black / Large||601842151884||588414||TOP41612456K|
|Matte Carbon/Gloss Trek Black / X-Large||601842151907||588415||TOP42686772K|