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It's right for you if...

You're building a custom all-mountain bike for getting a little wild and blasting sketchy lines. You love leaving the ground and you're looking for a ride you can whip around on the rowdiest trails.

The tech you get

An Alpha Platinum Aluminum frame with 150mm of rear travel and a RockShox Super Deluxe shock, plus a Straight Shot down tube and Knock Block headset with a Bontrager Line 35mm stem. Mino Link adjustable geometry and Control Freak cable routing for a dialed build. Made for 27.5" wheels.

The final word

A stout trail frame that's fun to ride on the roughest trails, and most at home on the biggest all-mountain rides. A piggyback shock that can keep up with the longest descents and dialed frame details give you a head start on your custom build.

The Walkthrough

favorite_borderWhy you'll love it

  1. You get a solid base for building a bike that can keep up on your wildest adventures
  2. Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
  3. Wider is more stable: Remedy has clearance for up to 27.5x2.8˝ tires
  4. Control Freak cable routing lets you run any set-up, like a right-front brake, internally-routed dropper, or electronic shifting


Features

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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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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Will my bike have a curved top tube?

Will my bike have a curved top tube?

Smaller frames (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.

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, 150mm travel
Shock RockShox Super Deluxe Select+, 230x57.5mm
Wheels
Rear skewer Bontrager Switch thru axle, removable lever
Components
Stem 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 - 3.95 kg / 8.70 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 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
15.5 S High 39.4 68.5° 74.7° 9.5 66.1° 56 35.6 9.4 43.3 4.6 11.2 113.9 73.9 40.1 58.3
15.5 S Low 39.4 67.9° 74.2° 9.5 65.5° 56.2 34.9 1.6 43.5 4.6 11.5 114 73.4 39.5 58.7
17.5 M High 41.9 68.5° 74.7° 10 66.1° 58.6 35.6 9.4 43.3 4.6 11.2 116.6 77.1 42.6 58.8
17.5 M Low 41.9 68.0° 74.2° 10 65.6° 58.8 34.9 1.6 43.5 4.6 11.5 116.7 76.6 42 59.2
18.5 ML High 44.5 68.5° 74.7° 10.5 66.1° 60.3 35.6 9.4 43.3 4.6 11.2 118.3 77.3 44.1 59.2
18.5 ML Low 44.5 68.0° 74.2° 10.5 65.6° 60.4 34.9 1.6 43.5 4.6 11.5 118.4 76.8 43.5 59.6
19.5 L High 47 68.5° 74.7° 11 66.1° 62.4 35.6 9.4 43.3 4.6 11.2 120.5 77 46.1 59.7
19.5 L Low 47 68.0° 74.2° 11 65.6° 62.5 34.9 1.6 43.5 4.6 11.5 120.6 76.5 45.5 60.1
21.5 XL High 52.1 68.5° 74.7° 12.5 66.1° 64.8 35.6 9.4 43.3 4.6 11.2 123.1 77.5 48.1 61
21.5 XL Low 52.1 68.0° 74.2° 12.5 65.6° 64.9 34.9 1.6 43.5 4.6 11.5 123.2 76.9 47.5 61.5

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