It's right for you if...
You’re looking for a do-it-all full suspension mountain bike that balances efficiency with capability. You want to rip rough trails, do a couple XC races, and even test yourself with an endurance or stage race.
The tech you get
A lightweight Alpha Platinum Aluminum frame, 120mm RockShox Recon RL fork with Motion Control damper, 115mm of rear travel with a Fox Performance Float shock, and a 1x12 SRAM NX Eagle drivetrain. Plus, Shimano hydraulic disc brakes, TwistLoc dual remote suspension lockout, Bontrager Line Dropper, and Tubeless Ready Bontrager Kovee Comp 23 wheels.
The final word
Top Fuel 8 is an efficient, capable, and ridiculously fun short-travel full suspension trail bike. It's built to take on technical terrain, flowy XC courses, and the demands of endurance mountain bike races.
favorite_borderWhy you'll love it
- This short-travel trail bike gives you a suspension setup that’s capable in several MTB disciplines, and especially suited to endurance events
- TwistLoc simultaneously locks out front and rear shocks for climbs and sprints with the simple Grip Shift-like motion
- Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
- 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
"Racing blood, trail spirit"
"It's devilishly quick, accelerates in a way that makes it seem like my legs actually produce real power. It's stable, planted, and it tracks like it's supposed to. Endurance athletes will be able to remain seated over more terrain, saving precious energy over the long haul, while XC pinners will hook up better on steep technical climbs."Read more
"Super light and fast as hell"
"The new Top Fuel might not be a pure XC-race bike anymore, but it's still precise and very fast. Its new trail orientation makes it a great choice for a rider who wants a fast and light bike with most of the the efficiency of a cross-country race bike, but with bit more versatility and playfulness."Read more
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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.
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. The rim strips are already installed; just add TLR valves and sealant.
TwistLoc Dual Remote Lockout
TwistLoc simultaneously locks out front and rear shocks with a simple Grip Shift-like motion; and it leaves room for a dropper post lever.
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.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel|
|Fork||RockShox Recon Gold RL, Solo Air spring, Motion Control damper, TwistLoc remote, tapered steerer, 46mm offset, Boost110, 15mm Maxle Stealth, 120mm travel|
|Shock||Fox Performance Float, 2-position DPS damper, TwistLoc remote, tuned by Trek Suspension Lab, 190x45mm|
|Suspension lever||SRAM TwistLoc dual remote|
|Max compatible fork travel||130mm|
|Front wheel||Bontrager Kovee Comp 23, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle|
|Rear wheel||Bontrager Kovee Comp 23, Tubeless Ready, 6-bolt, Shimano 8/9/10 freehub, 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''|
|Rim strip||Bontrager TLR|
|Max tire size||29x2.40"|
|Shifter||SRAM NX Eagle, 12 speed|
|Rear derailleur||SRAM NX Eagle|
SRAM NX Eagle, DUB, 32T steel ring, Boost (52mm chainline), 170mm length
M, M/L, L, XL, XXL
SRAM NX Eagle, DUB, 32T steel ring, Boost (52mm chainline), 175mm length
|Bottom bracket||SRAM DUB, 92mm, PressFit|
|Cassette||SRAM PG-1230 Eagle, 11-50, 12 speed|
|Chain||SRAM NX Eagle, 12 speed|
|Max chainring size||36T|
|Saddle||Bontrager Arvada, steel rails, 138mm width|
Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length
M, M/L, L, XL, XXL
Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length
|Handlebar||Bontrager Comp, alloy, 31.8mm, 15mm rise, 750mm width|
S, M, M/L
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree, 60mm length
L, XL, XXL
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree, 70mm length
|Headset||Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom|
|Brake||Shimano hydraulic disc, MT501 lever, MT500 caliper|
S, M, M/L, L, XL, XXL
Shimano RT56, 180mm, 6-bolt
S, M, M/L, L, XL, XXL
Shimano RT56, 160mm, 6-bolt
|Weight||M - 13.65 kg / 30.09 lbs (with tubes)|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).|
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.
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
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|