Fuel EX 9.9 is light, fast, and decked out with top-shelf components. It has a carbon frame, carbon wheels, FOX Factory Float suspension, and a fully wireless SRAM X01 Eagle AXS electronic drivetrain and RockShox Reverb AXS dropper. This is the one carbon full suspension mountain bike that rules every trail—it's fast on singletrack, light on climbs, and stable through the rowdiest terrain you can find.
It's right for you if...
You're a mountain biker through and through, and want a single carbon bike for the best performance on everything from marathon races to gnarly descents and technical trails. You're looking for the best frame, suspension, and parts spec available, including the advantage of fully wireless electronic components.
The tech you get
A light and stiff full OCLV Mountain Carbon frame, 140mm FOX Factory 36 Float fork with GRIP2 damper, 130mm of rear travel with a FOX Factory Float shock featuring Trek's exclusive RE:aktiv with Thru Shaft, and a fully wireless SRAM X01 Eagle AXS 1x12 electronic drivetrain and RockShox Reverb AXS dropper post. Plus, powerful Shimano XT 4-piston hydraulic disc brakes, Tubeless Ready Bontrager Line Carbon 30 wheels with a 54-tooth Rapid Drive rear hub for quick engagement, and a Bontrager Line Pro OCLV Carbon handlebar. An internal storage compartment lets you securely stow ride essentials and doesn't detract from the bike's sleek look.
The final word
If you can have just one mountain bike, this is it. Fuel EX 9.9 pairs the best OCLV Mountain Carbon frame we make with the highest-end parts on the market, including a wireless electronic drivetrain and dropper. It's equally at home on fast singletrack, gnarly trail, and laying down miles on your next multi-stage race.
Why you'll love it
- The SRAM X01 Eagle AXS drivetrain is smart, smooth, and completely wireless
- RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
- A sleek internal storage compartment gives you a versatile spot to stow tools and gear
- We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5" wheels, S frames get to choose between 27.5" or 29", and sizes M to XL get 29" wheels
- 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 the highlights of today’s electronic shifting systems:
Electronic shifting systems use powerful servomotors to rapidly shift the chain. Because microprocessors and sensors constantly monitor every aspect of the system, they shift with precisely and without chain rub.
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 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.
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.
Size X-Small: 27.5-inch
Size Small: 27.5-inch or 29-inch
Sizes Medium – X-Large: 29-inch
Pedals sold separately
|Frame||OCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel|
|Fork||Fox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm bolt-on axle, 140mm travel|
|Headset||Knock Block Integrated, cartridge bearing, 1-1/8'' top, 1.5'' bottom|
Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab
XS–S: 210x52.5mm; S–XL: 210x55mm
|Rims/Wheels||Bontrager Line Carbon 30, Tubeless Ready|
|Hubs||6-bolt, 54T Rapid Drive, XD Driver|
|Tires||Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 2.60''|
SRAM X01 Eagle AXS Carbon, DUB, Boost
XS–SM: 170mm length; M–XL: 175mm length
|Chainrings||32T alloy ring|
|Bottom Bracket||SRAM DUB, 92mm, PressFit|
|Chain||SRAM XX1 Eagle, 12 speed|
|Rear Derailleur||SRAM X01 Eagle AXS|
|Shifters||SRAM Eagle AXS, wireless, 12-speed|
|Handlebars||Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width|
|Tape/Grips||Bontrager XR Trail Elite, alloy lock-on|
Bontrager Line Pro, 35mm, Knock Block, 0 degree
XS– S: 40mm length; M–XL: 50mm length
|Brakes||Shimano XT M8120 4-piston hydraulic disc|
|Saddle||Bontrager Arvada, austenite rails, 138mm width|
RockShox Reverb AXS, 100mm travel, wireless, 31.6mm
XS– S: 340mm length; M–ML: 440mm length; L–XL: 480mm length
|Accessories & Extras||Bontrager BITS Internal Frame Storage Bag|
* Subject to change without notice.