More options
It's right for you if...
You’re looking for a do-it-all full-suspension mountain bike that's efficient and fast, but doesn't shy away from some bigger stuff. You want the added stiffness and weight savings of a carbon frame, and want blazing fast wireless electronic shifting.
The tech you get
A light and stiff full carbon frame, 120 mm RockShox SID Select+ fork, 120 mm of rear travel with a SID Luxe shock and a SRAM GX Eagle AXS wireless electronic drivetrain with an extra-low 52-tooth climbing gear. Plus, wide carbon Bontrager Line Elite 30 wheels with a 108-tooth Rapid Drive hub for instant engagement, Bontrager Line Elite Dropper and carbon handlebars.
The final word
The Top Fuel 9.8 is a ridiculously fun carbon down-country bike with upgraded parts that give you big benefits on the trail, like more speed from the carbon wheels, more grip from the ultra-smooth suspension and faster, more precise shifts from the AXS drivetrain.
The Walkthrough
favorite_borderWhy you'll love it
- The SRAM GX Eagle AXS drivetrain is smart, smooth and completely wireless
- A sleek internal storage compartment gives you a versatile spot to stow tools and gear
- This bike’s killer suspension set-up is both efficient and ready to party
- Wider Line Elite 30 wheels provide better tyre support so you can run lower pressure and get more traction
"Enduro’s Best Downcountry Bike of 2022"
"The Top Fuel 9.9 XX1 AXS earned top honours in Enduro’s round-up of best off-road rippers, thanks to the bike’s clean look, practical details and progressive suspension."
Read more
This is a really, really good bike
The Top Fuel is a very capable descender, but its well-proportioned geometry is just half the story. It manages to strike a great balance between grip, tracking and precision. The whole bike seems to just will you on to hit things faster and with more precision.
Read more
Built to respond: a pure down-country shredder
Top Fuel’s playful characteristics flatter your riding skills, progressive geometry takes care of tough terrain and a confidence-inspiring build makes this one of the most entertaining all-rounders you can buy.
Read more
This thing rips
The new Top Fuel is also much more composed on rough and fast descents. Thanks to the longer reach and slacker head angle, the overall wheelbase length has grown by almost 40 mm. That’s huge, and it offers a vastly more planted feel at speed. Along with the big tyres and active suspension, this really is a solid little trail bike.
Read moreYou might also like
Features
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.
Quick and in control
120 mm of rear travel combined with progressive trail geometry gives you a fast, responsive ride that helps you keep your cool when the trail turns rowdy.
Internal frame storage makes it easy to ditch the pack and still carry your ride essentials.
Guided internal cable routing keeps Top Fuel quiet on the trail and maintenance a breeze.
Will my bike have a curved top tube?
The smaller frames (XS and S) have a curved top tube. This design makes for a lower standover height, which allows shorter riders to straddle the bike more easily. The 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.
Complete Tubeless System
Tubeless Ready rims and tyres make it easy to ditch the tubes so you get better traction, fewer flats and less weight. You're ready to roll straight out of the box with the included TLR rim strips, valves and sealant.
Learn more
Suspension Calculator
This suspension calculator will help you optimise your suspension settings for your riding weight. Simply follow the steps to find your best set up.
Learn more
Carbon Care Wheel Loyalty Programme
Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Programme. 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.
Oversized 34.9mm dropper post
Bigger is better. The oversized seat tube diameter gives more support and strength for longer travel droppers, and allows for more robust, durable internals that work faster.
Threaded bottom bracket
More robust than pressfit, threaded BBs hold up in nasty conditions and make servicing easier.
ISCG mounts
International Standard Chain-Guide mounts offer easy chain-guide installation and adjustment.
Knock Block
Knock Block has your frame's back when things go wrong. It prevents your handlebars from spinning all the way around in a crash, so your hoses won't get yanked and your controls won't hit the top tube.
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
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120 mm travel |
|---|---|
| Fork | RockShox SID Select+, DebonAir spring, Charger 2 RL damper, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 120 mm travel |
| Shock | RockShox Deluxe Ultimate RCT, 185 mm x 50 mm |
| Max compatible fork travel | 130mm (541mm axle-to-crown) |
| Wheel front | Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle |
|---|---|
| Wheel rear | Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost 148, 12 mm thru axle |
| Hub front | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle |
| Hub rear | Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, Boost148, 12 mm thru axle |
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| Rim | Bontrager Line Elite 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
| Tyre | Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29.x2.40" |
| Tyre part | Bontrager TLR sealant, 180 ml/6 oz |
| Rim strip | Bontrager TLR |
| Max tyre size | Frame: 29x2.5" Fork: see manufacturer |
| Shifter | SRAM GX Eagle AXS, 12-speed |
|---|---|
| Rear derailleur | SRAM GX Eagle AXS |
| *Crank |
Size:
S, M, M/L, L SRAM GX Eagle, DUB MTB Wide, 30T, 55 mm chainline, 170 length |
|
Size:
XL SRAM GX Eagle, DUB MTB Wide, 30T, 55 mm chainline, 175 length |
|
| Bottom bracket | SRAM DUB MTB Wide, 73 m, BSA threaded |
| Cassette | SRAM Eagle XG-1275, 10-52, 12-speed |
| Chain | SRAM GX Eagle, 12-speed |
| Max. chainring size | Max: 36T (oval - 34T) Min: 28T |
| Saddle | Bontrager Arvada, austenite rails, 138 mm width |
|---|---|
| *Seatpost |
Size:
S Bontrager Line Elite Dropper, 100 mm travel, MaxFlow, internal routing, 34.9 mm, 345 mm length |
|
Size:
M, M/L Bontrager Line Elite Dropper, 150 mm travel, MaxFlow, internal routing, 34.9 mm, 440 mm length |
|
|
Size:
L Bontrager Line Elite Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 485 mm length |
|
|
Size:
XL Bontrager Line Elite Dropper, 200 mm travel, MaxFlow, internal routing, 34.9 mm, 550 mm length |
|
| *Handlebar |
Size:
S Bontrager Line Pro, OCLV Carbon, 35 mm, 15 mm rise, 750 mm width |
|
Size:
M, M/L, L, XL Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width |
|
| Stem | Bontrager Line Pro, 35 mm, Knock Block, Blendr-compatible, 0-degree, 45 mm length |
| Head set | Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8" top, 1.5" bottom |
| Brake | SRAM G2 RS hydraulic disc |
| *Brake rotor |
Size:
S, M, M/L, L, XL SRAM CenterLine, 6-bolt, round-edge, 160 mm |
|
Size:
S, M, M/L, L, XL SRAM CenterLine, 6-bolt, round edge, 180 mm |
| Weight | M - 12.50 kg / 27.56 lbs (with TLR sealant, no tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
Sizing & Tech
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 retailer.
All measurements provided in cm unless otherwise stated.
| Frame size number | Frame size letter | Geometry position | Wheel size | 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 | 29" | 39.5 | 70.4° | 76.4° | 10.0 | 66.4° | 56.7 | 34.3 | 3.1 | 43.4 | 4.4 | 11.5 | 115.0 | 71.9 | 42.4 | 59.2 |
| 15.5 | S | Low | 29" | 39.5 | 70.0° | 76.0° | 10.0 | 66.0° | 56.8 | 33.8 | 3.6 | 43.5 | 4.4 | 11.8 | 115.1 | 71.5 | 42.0 | 59.5 |
| 17.5 | M | High | 29" | 42.0 | 70.4° | 76.4° | 10.0 | 66.4° | 59.7 | 34.3 | 3.1 | 43.4 | 4.4 | 11.5 | 118.0 | 74.0 | 45.4 | 59.2 |
| 17.5 | M | Low | 29" | 42.0 | 70.0° | 76.0° | 10.0 | 66.0° | 59.8 | 33.8 | 3.6 | 43.5 | 4.4 | 11.8 | 118.1 | 73.5 | 45.0 | 59.5 |
| 18.5 | ML | High | 29" | 43.5 | 70.4° | 76.4° | 10.5 | 66.4° | 61.4 | 34.3 | 3.1 | 43.4 | 4.4 | 11.5 | 119.7 | 74.5 | 46.9 | 59.7 |
| 18.5 | ML | Low | 29" | 43.5 | 70.0° | 76.0° | 10.5 | 66.0° | 61.5 | 33.8 | 3.6 | 43.5 | 4.4 | 11.8 | 119.8 | 74.0 | 46.5 | 60.0 |
| 19.5 | L | High | 29" | 45.0 | 70.4° | 76.4° | 11.0 | 66.4° | 63.0 | 34.3 | 3.1 | 43.4 | 4.4 | 11.5 | 121.4 | 75.0 | 48.4 | 60.1 |
| 19.5 | L | Low | 29" | 45.0 | 70.0° | 76.0° | 11.0 | 66.0° | 63.1 | 33.8 | 3.6 | 43.5 | 4.4 | 11.8 | 121.5 | 74.5 | 48.0 | 60.5 |
| 21.5 | XL | High | 29" | 50.0 | 70.4° | 76.4° | 12.5 | 66.4° | 65.3 | 34.3 | 3.1 | 43.4 | 4.4 | 11.5 | 124.0 | 76.0 | 50.4 | 61.5 |
| 21.5 | XL | Low | 29" | 50.0 | 70.0° | 76.0° | 12.5 | 66.0° | 65.4 | 33.8 | 3.6 | 43.5 | 4.4 | 11.8 | 124.1 | 75.5 | 50.0 | 61.8 |