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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

  1. RE:aktiv is firm when you're pedaling and plush over bumps
  2. This bike is perfect for shredding singletrack, hitting drops, and pushing your limits on the longest days
  3. Control Freak cable management makes it easy to run any combination of controls, like front brake on the right or internal droppers
  4. We expanded our size range from XS through XL to ensure a better fit for all riders


Features

Will my bike have a curved top tube?

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

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.

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RE:aktiv

RE:aktiv technology gives you firm support for efficient pedaling that instantly gives way for smooth control when the trail turns rough.

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Straight Shot w/Knock Block

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.

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Specifications

*spec applies to all sizes unless otherwise noted

Frameset
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
Wheels
Skewer rear Bontrager Switch thru axle, removable lever
Components
*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
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).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

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

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

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