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.
favorite_borderWhy you'll love it
- The SRAM X01 Eagle AXS drive train 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 customisable through Project One
Will my bike have a curved top tube?
Smaller frames (XS and S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
Control Freak cable management
The lightest, quietest, most versatile cable management system allows any combination of shift, brake, lockout and dropper post lines to be routed through the frame for clean looks and the ultimate custom set-up.
Wider dropouts (110mm front, 148mm rear) give you the stiffness of a 27.5" wheel with all the benefits of a 29" wheel, and Boost148 at the back lets you run wider tyres and a larger chain ring without affecting q-factor and pedalling efficiency.
*spec applies to all sizes unless otherwise noted
|Fork||Fox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm bolt-on axle, 140mm travel|
XS , S
Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x52.5mm
S , M , ML , L , XL
Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x55 mm
|Front Wheel||Bontrager Line Carbon 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle|
|Rear Wheel||Bontrager Line Carbon 30, Tubeless Ready, 54T Rapid Drive, 6-bolt, SRAM XD driver, Boost148, 12 mm thru axle|
XS , S
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60"
S , M , ML , L , XL
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60"
|Shifter||SRAM Eagle AXS, wireless, 12-speed|
|Rear Derailleur||SRAM X01 Eagle AXS|
XS , S
SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost, 170mm length
M , ML , L , XL
SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost, 175mm length
|Bottom Bracket||SRAM DUB, 92 mm, PressFit|
|Chain||SRAM XX1 Eagle, 12-speed|
|Saddle||Bontrager Arvada, austenite rails, 138 mm width|
XS , S
RockShox Reverb AXS, 100 mm travel, wireless, 31.6 mm, 340 mm length
M , ML
RockShox Reverb AXS, 150mm travel, wireless, 31.6 mm, 440 mm length
L , XL
RockShox Reverb AXS, 170mm travel, wireless, 31.6 mm, 480 mm length
|Handlebar||Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width|
|Grips||Bontrager XR Trail Elite, alloy lock-on|
XS , S
Bontrager Line Pro, 35mm, Knock Block, 0 degree, 40mm length
M , ML , L , XL
Bontrager Line Pro, 35 mm, Knock Block, 0-degree, 50 mm length
|Headset||Knock Block Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom|
|Brake||Shimano XT M8120 4-piston hydraulic disc|
- M - 13.29 kg / 29.3 lbs (with tubes)
- Weight limit
- This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Sizing & fit
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
153.0 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
All measurements provided in cm unless otherwise stated.
|Frame size number||Frame size letter||Geometry position||Wheel size||A — Seat tube||B — Seat tube angle||C — Head tube length||D — Head angle||E — Effective top tube||F — Bottom bracket height||G — Bottom bracket drop||H — Chainstay length||I — Offset||J — Trail||K — Wheelbase||L — Standover||M — Frame reach||N — Frame stack|