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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 trail. You know you'll be riding this bike on every trail, so you're not going to compromise on frame material, suspension, or 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 1x12 SRAM X01 Eagle drivetrain. 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, a Bontrager Line Elite dropper post, and a Bontrager Line Pro OCLV Carbon handlebar. An internal storage compartment and Control Freak cable routing add to the bike's capability and sleek look.
The final word
If you can have just one mountain bike, this is it. Fuel EX 9.9 has the highest-end parts on the best OCLV Mountain Carbon frame we make. It's equally at home on fast singletrack, gnarly trail, and laying down miles on your next multi-stage race.
See it in action
favorite_borderWhy you'll love it
- Fuel EX 9.9 is the single best choice for riders who want an all-mountain ripper that excels at everything from marathon races to burly technical terrain to singletrack
- 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
"A world-class trail bike"
"Fuel EX is a beautifully balanced and capable trail bike. The rear suspension is beautiful; as close to ideal as any bike I've ridden. It's sensitive where you want it to be, firm and crisp where it should be. It feels deep and controls big hits very well, and there's a nice platform for pedaling, and to pump and pop off when you're playing."
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"Good at pleasing everybody"
"Fuel EX has a few tricks that help it keep a level head when outside of its comfort zone, and to be a cloud on rails when it's in the zone. Everything about the Fuel EX, which was already good at pleasing everybody, is now even better at it."
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"An absolute trail rocket"
"Thanks to its burlier components, increased travel, and more aggressive geometry, it has become more of a shredder than ever! More performance, fun, and trail prowess."
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"Perfect all-arounder"
"In a world where most new full-suspension mountain bikes are amazing, Fuel EX stands apart as even more than that."
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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.
Suspension Calculator
This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.
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Complete Tubeless System
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.
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ABP
Our patented Active Braking Pivot allows your suspension to work freely whether you’re on the brakes or off. It’s smooth, controlled suspension that’s at its best all the time.
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Carbon Care Wheel Loyalty Program
Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.
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Mino Link adjustable geometry
Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.
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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 setup.
Boost148/110
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 in the rear lets you run wider tires and a larger chainring without affecting q-factor and pedaling efficiency.
Specifications
*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 Kabolt axle, 140mm travel |
|---|---|
| Shock | Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x52.5mm |
| Max compatible fork travel | 150mm |
| Wheel front | Bontrager Line Carbon 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Wheel rear | Bontrager Line Carbon 30, Tubeless Ready, 54T Rapid Drive, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Tire | Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60'' |
| *Tire part |
Size:
XS , S Bontrager TLR valve, 50mm |
|
Size:
XS , S Bontrager TLR sealant |
|
| Rim strip | Bontrager TLR |
| Max tire size | 29x2.60" |
| Shifter | SRAM X01 Eagle, 12 speed |
|---|---|
| Rear derailleur | SRAM X01 Eagle |
| Crank | SRAM X01 Eagle Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 170mm length |
| Bottom bracket | SRAM DUB, 92mm, PressFit |
| Cassette | SRAM XG-1275 Eagle, 10-50, 12 speed |
| Chain | SRAM GX Eagle, 12 speed |
| Max chainring size | 34T |
| Saddle | Bontrager Arvada Pro, carbon rails, 138mm width |
|---|---|
| Seatpost | Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm, 340mm length |
| Handlebar | Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width |
| Grips | Bontrager XR Trail Elite, alloy lock-on |
| Stem | Bontrager Line Pro, 35mm, Knock Block, 0 degree, 40mm length |
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom |
| Brake | Shimano XT M8120 4-piston hydraulic disc |
| *Brake rotor |
Size:
XS , S Shimano RT76, 180mm, 6-bolt |
|
Size:
XS , S Shimano RT76, 203mm, 6-bolt |
| Weight | M - 13.01 kg / 28.68 lbs (with TLR sealant, no tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local retailer.
Rider Height
Inseam
XS
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
M/L
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
L
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
XL
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 noted.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13.5 | XS | High | 27.5" | 35.5 | 75.5° | 9.0 | 66.5° | 54.5 | 34.1 | 1.4 | 43.5 | 4.3 | 10.7 | 111.9 | 70.0 | 40.0 | 55.9 |
| 13.5 | XS | Low | 27.5" | 35.6 | 75.0° | 9.0 | 66.0° | 55 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 112.0 | 69.5 | 39.5 | 56.3 |
| 15.5 | S | High | 27.5" | 35.5 | 75.5° | 10.0 | 66.5° | 56.7 | 34.1 | 1.4 | 43.5 | 4.3 | 10.8 | 114.3 | 70.7 | 42.0 | 56.8 |
| 15.5 | S | Low | 27.5" | 39.5 | 75.0° | 10.0 | 66.0° | 56.8 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 114.4 | 70.2 | 41.5 | 57.2 |
| 15.5 | S | High | 29" | 39.5 | 75.5° | 10.0 | 66.5° | 57.7 | 34.6 | 2.8 | 43.5 | 4.3 | 11.5 | 115.3 | 70.7 | 42.0 | 60.5 |
| 15.5 | S | Low | 29" | 39.5 | 75.0° | 10.0 | 66.0° | 57.8 | 33.9 | 3.4 | 43.7 | 4.3 | 11.9 | 115.4 | 70.2 | 41.5 | 60.8 |
| 17.5 | M | High | 29" | 42.0 | 75.5° | 10.0 | 66.5° | 60.2 | 34.6 | 2.8 | 43.5 | 4.3 | 11.6 | 117.8 | 74.7 | 44.5 | 60.5 |
| 17.5 | M | Low | 29" | 42.0 | 75.0° | 10.0 | 66.0° | 60.3 | 33.9 | 3.4 | 43.7 | 4.3 | 11.9 | 117.9 | 74.1 | 44.0 | 60.8 |
| 18.5 | ML | High | 29" | 43.5 | 75.5° | 10.5 | 66.5° | 61.8 | 34.6 | 2.7 | 43.5 | 4.3 | 11.6 | 119.5 | 75.2 | 46.0 | 60.9 |
| 18.5 | ML | Low | 29" | 43.5 | 75.0° | 10.5 | 66.0° | 61.9 | 33.9 | 3.4 | 43.7 | 4.3 | 11.9 | 119.6 | 74.6 | 45.5 | 61.3 |
| 19.5 | L | High | 29" | 45.0 | 75.5° | 10.5 | 66.5° | 63.3 | 34.6 | 2.7 | 43.5 | 4.3 | 11.6 | 121.0 | 75.4 | 47.5 | 60.9 |
| 19.5 | L | Low | 29" | 45.0 | 75.0° | 10.5 | 66.0° | 63.4 | 33.9 | 3.4 | 43.7 | 4.3 | 11.9 | 121.1 | 74.8 | 47.0 | 61.3 |
| 21.5 | XL | High | 29" | 50.0 | 75.5° | 12.0 | 66.5° | 66.1 | 34.6 | 2.7 | 43.5 | 4.3 | 11.6 | 124.1 | 77.6 | 50.0 | 62.3 |
| 21.5 | XL | Low | 29" | 50.0 | 75.0° | 12.0 | 66.0° | 66.3 | 33.9 | 3.4 | 43.7 | 4.3 | 11.9 | 124.2 | 77.0 | 49.5 | 62.7 |
