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  • Top Fuel AL Frameset
NEW 2020

Top Fuel AL Frameset

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$1,999.99 Model 28508

Top Fuel AL is an aluminum full suspension frameset ideal for building up a seriously fun multi-discipline mountain bike. It combines the lightweight efficiency of a cross country bike with the capability of a short-travel trail bike, so you can spec it to shred trail, race grueling endurance events, compete in XC races, or all of the above.

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It's right for you if...

You want to build up one single full suspension bike that's super fun to ride on a wide variety of trails. You're looking for a frame that's designed for both efficiency and capability, and are interested in racing endurance events, riding techy descents with friends, and even racing XC.

The tech you get

A lightweight Alpha Platinum Aluminum frame with Mino Link adjustable geometry, a 115mm Fox Performance Float shock with 2-position DPS damper, Knock Block headset, and Control Freak internal cable routing. Designed for a 120mm fork, but can handle up to 130mm of fork travel.

The final word

Top Fuel AL is the high-value foundation for a versatile full suspension build. Whether you're hoping to compete in a multi-day stage race or want one single bike that's fast and capable on both flow trails and technical descents, this is the place to start.

The Walkthrough

favorite_borderWhy you'll love it

  1. Alpha Platinum Aluminum is lightweight and trail-tough
  2. Efficient and capable: you can build up this frameset to suit a wide range of trails and races, from XC to endurance
  3. Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
  4. You get a Straight Shot down tube for extra stiffness in the rough and Knock Block frame defense to protect against spinning bars and fork crowns

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Features

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.

Learn more

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.

Learn more

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.

Specifications

  • Frameset

    Frame
    Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel
    Rear suspension
    Fox Performance Float, 2-postion DPS damper, tuned by Trek Suspension Lab, 190x45mm

  • Components

    Headset
    Knock Block Integrated, cartridge bearing, 1-1/8" top, 1.5" bottom

  • Weight

    Weight
    M - 3.23 kg / 7.11 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° 75.5° 9.0 68.0° 56.3 34.3 3.0 43.4 4.4 10.3 111.7 73.0 41.0 59.0
15.5 S Low 39.4 68.0° 75.0° 9.0 67.5° 56.4 33.7 3.6 43.5 4.4 10.7 111.7 72.5 40.5 59.4
17.5 M High 41.9 68.5° 75.5° 9.0 68.0° 59.8 34.3 3.0 43.4 4.4 10.3 115.2 73.5 44.5 59.0
17.5 M Low 41.9 68.0° 75.0° 9.0 67.5° 59.9 33.7 3.6 43.5 4.4 10.7 115.2 73.0 44.0 59.4
18.5 ML High 44.5 68.5° 75.5° 9.0 68.0° 61.4 34.3 3.0 43.4 4.4 10.3 116.8 74.1 46.1 59.0
18.5 ML Low 44.5 68.0° 75.0° 9.0 67.5° 61.5 33.7 3.6 43.5 4.4 10.7 116.8 73.5 45.6 59.4
19.5 L High 47.0 68.5° 75.5° 10.0 68.0° 63.0 34.3 2.9 43.4 4.4 10.3 118.5 75.1 47.5 59.9
19.5 L Low 47.0 68.0° 75.0° 10.0 67.5° 63.2 33.7 3.6 43.5 4.4 10.7 118.6 74.5 47.0 60.3
21.5 XL High 52.1 68.5° 75.5° 11.0 68.0° 65.0 34.3 2.9 43.4 4.4 10.3 120.6 77.1 49.2 60.8
21.5 XL Low 52.1 68.0° 75.0° 11.0 67.5° 65.1 33.7 3.6 43.5 4.4 10.7 120.7 76.5 48.7 61.2

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