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It's right for you if...
You ride more than one type of trail, so you're searching for a versatile trail bike platform that will give you the best bones for a ride that's quick and fun on a variety of terrain.
The tech you get
A lightweight Alpha Platinum Aluminum frame with 130mm of travel and Mino Link adjustable geometry, a FOX Performance shock with Trek's exclusive RE:aktiv damper, and an included Bontrager Line stem and Knock Block headset that prevents damage to the frame from spinning handlebars and fork crowns. Built for a PF92 bottom bracket and a 140mm fork.
The final word
Fuel EX AL is burly enough for big features but agile enough for fast singletrack sessions. It's a great all-around frameset for the mountain biker who wants to explore all kinds of terrain on a single full suspension trail bike.
See it in action
favorite_borderWhy you'll love it
- RE:aktiv is firm when you're pedaling and plush over bumps
- This bike is perfect for shredding singletrack, hitting drops, and pushing your limits on the longest days
- Control Freak cable management makes it easy to run any combination of controls, like front brake on the right or internal droppers
- We expanded our size range from XS through XL to ensure a better fit for all riders
"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."
Read moreFeatures
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.
Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.
RE:aktiv technology gives you firm support for efficient pedaling that instantly gives way for smooth control when the trail turns rough.
Trek's Straight Shot frame design optimizes the stiffness-to-weight ratio for a more responsive ride. You'll be able to push harder and stay more planted on your line when the going gets rough.
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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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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Alpha Platinum Aluminum
Our premium lightweight aluminum is continuously cold extruded and butted at multiple points, and hydroformed into sophisticated tube shapes for maximum strength and minimum weight.
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
| Frame | Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel |
|---|---|
| *Shock |
Size:
XS , S Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm |
|
Size:
S , M , ML , L , XL , XXL Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x55mm |
| Skewer rear | Bontrager Switch thru axle, removable lever |
|---|
| *Stem |
Size:
XS , S Bontrager Line, 35mm, Knock Block, 0 degree, 40mm length |
|---|---|
|
Size:
M , ML , L , XL , XXL Bontrager Line, 35mm, Knock Block, 0 degree, 50mm length |
|
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom |
| Weight | M - 3.71 kg / 8.19 lbs |
|---|---|
| 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 Trek 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"
2XL
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
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 | Effective 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.0 | XS | Low | 27.5" | 35.6 | 69.0° | 75.0° | 9.0 | 66.0° | 54.6 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 112.0 | 69.5 | 39.5 | 56.3 |
| 14.0 | XS | High | 27.5" | 35.5 | 69.5° | 75.5° | 9.0 | 66.5° | 54.5 | 34.1 | 1.4 | 43.6 | 4.3 | 10.6 | 111.9 | 70.0 | 40.0 | 55.9 |
| 15.5 | S | High | 27.5" | 39.5 | 69.5° | 75.5° | 10.0 | 66.5° | 56.7 | 34.1 | 1.4 | 43.6 | 4.3 | 10.6 | 114.3 | 70.7 | 42.0 | 56.8 |
| 15.5 | S | Low | 27.5" | 39.5 | 69.0° | 75.0° | 10.0 | 66.0° | 56.8 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 114.4 | 70.0 | 41.5 | 57.2 |
| 15.5 | S | High | 29" | 39.5 | 68.0° | 75.5° | 10.0 | 66.5° | 57.7 | 34.6 | 2.8 | 43.6 | 4.3 | 11.5 | 115.3 | 70.7 | 42.0 | 60.5 |
| 15.5 | S | Low | 29" | 39.5 | 67.5° | 75.0° | 10.0 | 66.0° | 57.8 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 115.4 | 70.1 | 41.5 | 60.9 |
| 17.5 | M | Low | 29" | 42.0 | 67.5° | 75.0° | 10.0 | 66.0° | 60.3 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 117.9 | 74.2 | 44.0 | 60.9 |
| 17.5 | M | High | 29" | 42.0 | 68.0° | 75.5° | 10.0 | 66.5° | 60.2 | 34.6 | 2.8 | 43.6 | 4.3 | 11.6 | 117.8 | 74.8 | 44.5 | 60.5 |
| 18.5 | ML | Low | 29" | 43.5 | 67.5° | 75.0° | 10.5 | 66.0° | 61.9 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 119.6 | 74.5 | 45.5 | 61.3 |
| 18.5 | ML | High | 29" | 43.5 | 68.0° | 75.5° | 10.5 | 66.5° | 61.8 | 34.6 | 2.8 | 43.6 | 4.3 | 11.6 | 119.5 | 75.1 | 46.0 | 60.9 |
| 19.5 | L | Low | 29" | 45.0 | 67.5° | 75.0° | 10.5 | 66.0° | 63.4 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 121.1 | 75.0 | 47.0 | 61.3 |
| 19.5 | L | High | 29" | 45.0 | 68.0° | 75.5° | 10.5 | 66.5° | 63.3 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 121.0 | 75.6 | 47.5 | 60.9 |
| 21.5 | XL | Low | 29" | 50.0 | 67.5° | 75.0° | 12.0 | 66.0° | 66.3 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 124.2 | 76.2 | 49.5 | 62.7 |
| 21.5 | XL | High | 29" | 50.0 | 68.0° | 75.5° | 12.0 | 66.5° | 66.2 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 124.1 | 76.8 | 50.0 | 62.3 |
| 23.0 | XXL | Low | 29" | 54.0 | 67.5° | 75.0° | 14.0 | 66.0° | 68.8 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 127.0 | 80.0 | 51.5 | 64.5 |
| 23.0 | XXL | High | 29" | 54.0 | 68.0° | 75.5° | 14.0 | 66.5° | 68.7 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 126.9 | 80.6 | 52.0 | 64.1 |