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It's right for you if...

You're looking for the fastest way to a good time on the trail, and you're willing to crack open the piggy bank for top-shelf suspension and lots of lightweight carbon.

The tech you get

A light and stiff full carbon frame, 120mm Fox Factory 34 Step-Cast fork, 115mm of rear travel with a Fox Factory Float shock, and a new SRAM X01 Eagle drivetrain with an extra-low 52-tooth climbing gear. Plus, wide carbon Bontrager Kovee Pro 30 wheels with a 108-tooth Rapid Drive hub for instant engagement, Bontrager DropLock dual remote suspension lockout, and lots of carbon everywhere.

The final word

With Top Fuel 9.9, you get a smooth, fast ride that doesn't shy away from rowdy trails. An OCLV Mountain Carbon frame, top-of-the-line suspension, and carbon components join forces for a nimble and insanely fun ride.

The Walkthrough

favorite_borderWhy you'll love it

  1. It’s the ultimate down-country bike—light, capable, and trimmed with high-performance components
  2. Wider Kovee Pro 30 wheels provide better tire support so you can run lower pressure and get more traction
  3. Bontrager DropLock's shifter-style lever lets you easily lock out both front and rear shocks at the same time for added sprinting or climbing efficiently. Plus, it controls your dropper post too
  4. This short-travel bike has a killer suspension setup reminiscent of the all-mighty mullet—it's both efficient and ready to party
  5. Make it yours: it's fully customizable through Project One

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Features

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.

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.

Learn more
Straight Shot downtube

Straight Shot downtube

Straight Shot downtube gives you an extra-stiff frame without adding any weight, so you can stick your line through the rough stuff and still fly up the next climb.

Rapid Drive 108 rear hub

Rapid Drive 108 rear hub

With 108 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.

Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Fork Fox Factory 34 Step-Cast, Float EVOL air spring, FIT4 2-position damper, dual remote lockout, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm Kabolt axle, 120mm travel
Shock Fox Factory Float, 2-position DPS damper, Kashima Coat, 190x45mm
*Suspension lever Size: S, M, M/L, L, XL
Bontrager Drop Lock remote
Size: S, M, M/L, L, XL
SRAM TwistLoc dual remote with grips
Wheels
Front wheel Bontrager Kovee Pro 30 carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Rear wheel Bontrager Kovee Pro 30 carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle
Rear skewer Bontrager Switch thru axle, removable lever
Tire Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40''
*Tire part Size: S, M, M/L, L, XL
Bontrager TLR valve, 50mm
Size: S, M, M/L, L, XL
Bontrager TLR sealant
Rim strip Bontrager TLR
Drivetrain
Shifter SRAM X01 Eagle, 12 speed
Rear derailleur SRAM X01 Eagle
*Crank Size: S
SRAM X01 Eagle, DUB, 32T alloy ring, Boost (52mm chainline), 170mm length
Size: S
SRAM X01 Eagle Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 170mm length
Size: M, M/L, L, XL
SRAM X01 Eagle, DUB, 32T alloy ring, Boost (52mm chainline), 175mm length
Size: M, M/L, L, XL
SRAM X01 Eagle Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 175mm length
Bottom bracket SRAM DUB, 92mm, PressFit
Cassette SRAM Eagle XG-1275, 10-52, 12 speed
Chain SRAM XX1 Eagle, 12 speed
Weight
Weight M - 11.30 kg / 24.92 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).
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 68.0° 56.3 34.3 3 43.4 4.4 10.3 111.7 73.1 41 59
15.5 S Low 39.4 68.0° 75.0° 9 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 Low 41.9 68.0° 75.0° 9 67.5° 59.9 33.7 3.6 43.5 4.4 10.7 115.2 73 44 59.4
17.5 M High 41.9 68.5° 75.5° 9 68.0° 59.8 34.3 3 43.4 4.4 10.3 115.2 73.6 44.5 59
18.5 ML High 44.5 68.5° 75.5° 9 68.0° 61.4 34.3 3 43.4 4.4 10.3 116.8 74.1 46.1 59
18.5 ML Low 44.5 68.0° 75.0° 9 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 68.5° 75.5° 10 68.0° 63 34.3 2.9 43.4 4.4 10.3 118.5 75.1 47.5 59.9
19.5 L Low 47 68.0° 75.0° 10 67.5° 63.2 33.7 3.6 43.5 4.4 10.7 118.6 74.5 47 60.3
21.5 XL High 52.1 68.5° 75.5° 11 68.0° 65 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 67.5° 65.1 33.7 3.6 43.5 4.4 10.7 120.7 76.5 48.7 61.2
23 XXL High 57 68.5° 75.5° 12 68.0° 67.5 34.3 2.9 43.4 4.4 10.3 123.3 78.6 51.5 61.7
23 XXL Low 57 68.0° 75.0° 12 67.5° 67.7 33.7 3.6 43.5 4.4 10.7 123.4 78 51 62.2

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