Trek Top Fuel 8 XT
Details
Top Fuel is a quick short-travel 29er trail bike that’s perfect for riders who like to stay pinned both up and down the trail.
It’s lighter and snappier than a trail bike, but it’s a lot more forgiving on rowdy descents than a true cross-country bike. It’s the best of both worlds, and a hell of a lot of fun in the dirt.
The Top Fuel features a lightweight Platinum Aluminum frame, 120mm RockShox SID fork with plush DebonAir spring, 120mm of rear travel with a FOX Performance Float shock, and a Shimano Deore XT drivetrain. Plus, 4-piston brakes make for confident descents.
Top Fuel 8 earned high praise from Bike Radar MBUK for its updated geometry, a build that's up for anything, and suspension that feels deeper than the sum of its numbers when the trail gets rowdy.
It also earned top honors in Enduro Mounatin Bike Magazine's roundup of best downcountry bikes, thanks to the Top Fuel's clean look, practical details, and progressive suspension.
Top Fuel has evolved from its XC racing roots. Now, it’s a blazing fast downcountry trail bike that’s seriously fun in the rough.
Loves to pedal up
Leaps forward thanks to a light frame and pedal-friendly suspension kinematics
Lives for challenging descents
Built with longer, slacker geometry and trail bike suspension and spec.
Rip down and rocket up any trail with Top Fuel’s capable and efficient suspension. 120mm of travel front and rear gives you enough squish to take bigger hits while a low leverage rate and high anti-squat ensure this bike jumps forward with every pedal stroke.
Optimized anti-squat = Snappy pedaling support
Top Fuel's efficient pedaling comes from a forward pivot on the seattube that provides optimal, near-constant anti-squat through the entire travel. So regardless of where you are in the travel, the bike accelerates when you push on the pedals.
All Top Fuel models—both alloy and carbon—have in-frame storage for tools and gear. Plus, Bontrager’s BITS tool bag fits right inside.
Specs
| Frame | Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel |
|---|---|
| Fork | RockShox SID, DebonAir spring, Rush RL damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel |
| Rear Shock | RockShox Deluxe Ulitmate RCT, 185mm x 50mm |
| Wheels |
Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 54, 6-bolt, Boost148, 12mm thru axle |
| Tires | Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29 x 2.40" |
| Bottom Bracket | Shimano SM-BB52, 73mm, threaded external bearing |
| Crankset | Shimano Deore M6120, 30T ring, 55mm chainline |
| Shifters | Shimano XT M8100, 12 speed |
| Rear Derailleur | Shimano XT M8100, long cage, 51T max cog |
| Cassette/Freewheel | Shimano SLX M7100, 10-51, 12 speed |
| Chain | Shimano SLX M7100, 12 speed |
| Brakes | Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper |
| Rotors | Shimano RT66, 6-bolt |
| Handlebars | Bontrager Line, alloy, 35mm, 27.5mm rise |
| Tape/Grips | Bontrager XR Trail Comp, nylon lock-on |
| Stem | Bontrager Elite, 35mm, 0 degree, 45mm length |
| Headset | Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8" top, 1.5" bottom |
| Seatpost | TranzX JD-YSI-22PLQ, internal routing, 34.9mm |
| Saddle | Bontrager Arvada, steel rails, 138mm width |
| Pedals | Sold separately |
| Accessories & Extras | Bontrager BITS Internal Frame Storage Bag |
* Subject to change without notice.
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| Mulsanne Blue / Medium/Large | 601842583203 | 5259801 | BIK453910232 |
