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Trek Top Fuel 9.9 SL AXS

Trek Top Fuel 9.9 SL AXS
  • Color: Matte Carbon Smoke
Matte Carbon Smoke
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Top Fuel 9.9 AXS is our fastest full suspension XC mountain bike. Everything on this bike is geared toward helping you go faster and perform better. An OCLV Mountain Carbon frame with a fully wireless SRAM XX1 Eagle AXS drivetrain, carbon components, and a super-lightweight full suspension setup make Top Fuel 9.9 AXS a race-ready rocket that flies over gnarly terrain on its way to the podium.

It's right for you if...
Whether you're racing or training, you want to be the fastest. You want a bike that exceeds expectations in all categories—light weight, strength, speed, and efficiency. And you want the quickness and precision of a fully wireless drivetrain so you never miss a shift again.

The tech you get
An OCLV Mountain Carbon mainframe and stays, a wireless SRAM XX1 Eagle AXS 1x12 drivetrain with carbon cranks, 100mm front and rear suspension with a super-light and super-plush RockShox SID SE carbon fork. Plus, Bontrager Kovee Pro 30 carbon wheels with a 108-tooth Rapid Drive hub, a TwistLoc dual remote suspension lockout, SRAM Level Ultimate brakes with carbon levers, and a carbon handlebar and seatpost.

The final word
This is hands down the fastest full suspension XC mountain bike we make, trimmed with the best parts out there. A carbon frame and components, top-of-the-line suspension, and a fully wireless drivetrain come together in Top Fuel 9.9 AXS to make it the fastest bike on the line. The rest is up to you.

Why you'll love it
- The SRAM XX1 Eagle AXS drivetrain is smart, smooth, and completely wireless
- This is full suspension performance at the weight of a hardtail
- TwistLoc simultaneously locks out front and rear shocks for climbs and sprints with the simple Grip Shift-like motion
- Wider Kovee Pro 30 wheels provide better tire support so you can run lower pressure and get more traction
- Make it yours: it's fully customizable through Project One

Electronic drivetrain systems deliver excellent shifting, easy set up, and solid battery life. Here are some benefits of electronic shifting that you don't want to miss.

Electronic shifting delivers exceptional performance.

Shifting Performance

Electronic shifting systems use powerful servo motors to rapidly shift the chain. Because microprocessors and sensors constantly monitor every aspect of the system, they shift with surgical precision and without chain rub.

Electronic shifting is customizable.


Many major systems have customizable shifting. Some have the ability to add remote shifters for common riding positions, and some even allow you to change the functions of the shifting buttons.

Electronic shifting is light on the maintenance.


Electronic groupsets are responsive and consistent. There are no cables to stretch and wear out, so you get a flawless shift every time. The added bonus is you'll never have to replace a derailleur cable ever again.


Frame OCLV Mountain Carbon main frame & stays, ABP, Full Floater, EVO link, tapered head tube, Mino Link, MicroTruss, Control Freak internal routing, Carbon Armor, PF92, Boost148 & G2 Geometry on 29ers, 100mm travel
Fork RockShox SID SE Carbon, DebonAir, Motion Control damper, TwistLoc remote lockout, tapered steerer, G2 Geometry w/51mm offset on 29ers, Boost110, 100mm travel
Headset FSA IS-2, 1-1/8" top, 1.5" bottom
Rear Shock Fox Factory Float DPS, 2-position remote, Kashima Coat, tuned by Trek Suspension Lab, 6.5x1.5?
Axles Front: 15x110mm
Rear: 12x148mm
Rims/Wheels Bontrager Kovee Pro 30 carbon, Tubeless Ready, 108T Rapid Drive, Boost110 front, Boost148 rear (15.5: 142x12 rear), tubeless strips included, valves sold separately
Tires Bontrager XR2 Team Issue, Tubeless Ready, 120 tpi, aramid bead, 29x2.20
Crankset SRAM XX1 Eagle AXS Carbon, DUB, Boost, 175mm length
Chainrings 32T alloy ring
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 Kovee XXX, OCLV Carbon, 35mm, 0mm rise, 720mm width
Stem Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 90mm length
Brakes SRAM Level Ultimate hydraulic disc, carbon levers, 180mm front rotor, 160mm rear rotor
Saddle Bontrager Montrose Pro, 7x10mm carbon rails, 138mm width
Seat Post Bontrager XXX, OCLV Carbon, 31.6mm, 0mm offset, 400mm length

* Subject to change without notice.

Part Numbers

Option UPC MPN
Matte Carbon Smoke / Medium 601842141380 587975
Matte Carbon Smoke / Medium-Large 601842141359 587976
Matte Carbon Smoke / Large 601842141373 587977
Matte Carbon Smoke / X-Large 601842141366 587978