More options
It's right for you if...
You want an efficient, capable, short-travel trail bike that excels at endurance and stage racing and can handle rough trails and even XC races. You appreciate the performance advantage of carbon and want a superlight bike with race-level components and suspension.
The tech you get
A full OCLV Mountain Carbon frame, upgraded 120mm Fox Performance 34 Step-Cast Float fork with GRIP damper, 115mm of rear travel with a FOX Performance Float shock, and a 1x12 Shimano XT drivetrain. Plus, wide carbon Bontrager Kovee Elite 30 wheels with a 54-tooth Rapid Drive hub for fast engagement, TwistLoc dual remote suspension lockout, Bontrager Line Elite Dropper, Bontrager Line Pro OCLV Carbon handlebar, and upgraded Shimano SLX brakes.
The final word
Top Fuel 9.8 is an efficient, capable, and ridiculously fun short-travel carbon trail bike with the performance boost of upgraded parts like the drivetrain, fork, and brakes. It's built to rip technical terrain and descents, speed through flow sections, and withstand the beating endurance races dole out.
The Walkthrough
favorite_borderWhy you'll love it
- This bike wants to go fast—it's built with no-nonsense, high-performance parts
- 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
- TwistLoc simultaneously locks out front and rear shocks for climbs and sprints with the simple Grip Shift-like motion
- Wider Kovee Elite 30 wheels provide better tire support so you can run lower pressure and get more traction
- This short-travel trail bike gives you a suspension setup that’s capable in several MTB disciplines, and especially suited to endurance events
"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
"A little more travel, a lot more aggressive"
"Top Fuel is damn efficient heading up, but when you hit a downhill the bike rides much more like a lightweight trail bike than a purebred XC race machine, and has no hesitation getting a little rowdy if you're willing to let it."
Read more
"From XC whippet to all-round shredder"
"Smash down on the cranks and it leaps forward like a bullet from a gun, both uphill and downhill. if you enjoy the simple pleasure of crushing climbs and making the most of every descent, the Trek Top Fuel is your passport to a world of fun."
Read moreYou might also like
Features
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 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.
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.
Trek's mountain-specific carbon fiber is tougher carbon, with unique materials and layup procedures, Trek's advanced engineering, and a higher standard of testing.
Learn more
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
Carbon Care Wheel Loyalty Program
Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.
Learn more
Complete Tubeless System
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, 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.
Warrantied for life
Carbon wheels can give your ride an instant upgrade in speed and handling—and when you choose Bontrager, your investment is protected. All Bontrager carbon wheels are backed by a lifetime warranty for the original owner.
Learn more
Blendr stem
Bontrager stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.
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
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel |
|---|---|
| Fork | Fox Performance 34 Step-Cast, Float EVOL air spring, GRIP 2-position damper, dual remote, tapered steerer, 44mm offset, Boost110, 15mm bolt-on axle, 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 Elite 30 carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Rear wheel | Bontrager Kovee Elite 30 carbon, Tubeless Ready, 54T Rapid Drive, 6-bolt, Shimano MicroSpline 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'' |
| Tire part | Bontrager TLR valve, 50mm |
| Max tire size | 29x2.40" |
| Shifter | Shimano XT M8100, 12 speed |
|---|---|
| Rear derailleur | Shimano XT M8100, long cage, 51T max cog |
| *Crank |
Size:
S Shimano XT M8100, 32T alloy ring, Boost (52mm chainline), 170mm length |
|
Size:
M, M/L, L, XL Shimano XT M8100, 32T alloy ring, Boost (52mm chainline), 175mm length |
|
| Bottom bracket | Shimano MT500, 92mm, PressFit |
| Cassette | Shimano XT M8100, 10-51, 12 speed |
| Chain | Shimano XT M8100, 12 speed |
| Max chainring size | 36T |
| Saddle | Bontrager Montrose Elite, titanium rails, 138mm width |
|---|---|
| *Seatpost |
Size:
S Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm, 340mm length |
|
Size:
M, M/L Bontrager Line Elite Dropper, 150mm travel, internal routing, 31.6mm, 440mm length |
|
|
Size:
L, XL Bontrager Line Elite Dropper, 170mm travel, internal routing, 31.6mm, 480mm length |
|
| Handlebar | Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width |
| *Stem |
Size:
S, M, M/L Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 60mm length |
|
Size:
L, XL Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 70mm length |
|
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom |
| Brake | Shimano SLX M7100 hydraulic disc |
| *Brake rotor |
Size:
S, M, M/L, L, XL Shimano RT66, 6-bolt, 180mm |
|
Size:
S, M, M/L, L, XL Shimano RT66, 160mm, 6-bolt |
| Weight | M - 11.94 kg / 26.32 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). |
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
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
M/L
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
L
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
2XL
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 23.5 | XXL | High | 57.0 | 68.5° | 75.5° | 12.0 | 68.0° | 67.5 | 34.3 | 2.9 | 43.4 | 4.4 | 10.3 | 123.3 | 78.6 | 51.5 | 61.7 |
| 23.5 | XXL | Low | 57.0 | 68.0° | 75.0° | 12.0 | 67.5° | 67.7 | 33.7 | 3.6 | 43.5 | 4.4 | 10.7 | 123.4 | 78.0 | 51.0 | 62.2 |