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, but don't mind saving some money on the parts.
The tech you get
A light and stiff full carbon frame, 120mm RockShox SID Select+ fork, 120mm of rear travel with a RockShox SID Luxe Ultimate shock, and a new Shimano XT 1x12 drivetrain. Plus, wide carbon Bontrager Line Elite 30 wheels with a 108-tooth Rapid Drive hub for instant engagement, 4-piston brakes for confident descents, Bontrager Line Elite Dropper, and carbon handlebars.
The final word
Top Fuel 9.8 is a ridiculously fun carbon down-country bike with upgraded parts that give you noticeable benefits on the trail, like more speed from the carbon wheels and more grip from the ultra-smooth suspension.
favorite_borderWhy you'll love it
- Wider Line Elite 30 wheels provide better tire support so you can run lower pressure and get more traction
- A sleek internal storage compartment gives you a versatile spot to stow tools and gear
- This bike’s killer suspension setup is both efficient and ready to party
- New, removable Knock Block has a bigger steering angle to keep cables and hoses safe without sacrificing turning radius
MBUK’s Trail Bike of the Year 2022
“It’s easy to look at the bike from afar and assume this is just another downcountry rig... It wasn’t until I’d fired it over some jumps, nosed it down the odd steep chute and slung it through my test loops’ berms that I realised the Top Fuel is, simply put, a bloody brilliant trail bike.”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
"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 40mm. 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 more
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Quick and in control
120mm 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.
Will my bike have a curved top tube?
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. 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.
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.
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.
International Standard Chain Guide mounts offer easy chain guide installation and adjustment.
*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, 120mm travel|
|Fork||RockShox SID Select+, DebonAir spring, Charger 2 RL damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel|
|Shock||RockShox Deluxe Ulitmate RCT, 185mm x 50mm|
|Max compatible fork travel||130mm (541mm axle-to-crown)|
|Wheel front||Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle|
|Wheel rear||Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle|
|Hub front||Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle|
|Hub rear||Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano MicroSpline freehub, Boost148, 12mm thru axle|
|Skewer rear||Bontrager Switch thru axle, removable lever|
|Rim||Bontrager Line Elite 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle|
|Tire||Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40''|
|Tire part||Bontrager TLR sealant, 6oz|
|Rim strip||Bontrager TLR|
|Max tire size||Frame: 29x2.5" Fork: see manufacturer|
|Shifter||Shimano XT M8100, 12 speed|
|Rear derailleur||Shimano XT M8100, long cage|
S, M, M/L, L
Shimano XT M8120, 30T, 55mm chainline, 170mm length
Shimano XT M8120, 30T, 55mm chainline, 175mm length
|Bottom bracket||Shimano SM-BB52, 73mm, threaded external bearing|
|Cassette||Shimano XT M8100, 10-51, 12 speed|
|Chain||Shimano Ultegra/XT M8100, 12 speed|
|Max chainring size||Max: 36T (oval - 34T) Min: 28T|
|Saddle||Bontrager Arvada, austenite rails, 138mm width|
Bontrager Line Elite Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 345mm length
Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length
Bontrager Line Elite Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 485mm length
Bontrager Line Elite Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 550mm length
Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width
M, M/L, L, XL
Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
|Grips||Bontrager XR Trail Elite, nylon lock-on|
|Stem||Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 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|
|Brake||Shimano XT M8120 4-piston hydraulic disc|
S, M, M/L, L, XL
Shimano RT76, 6-bolt, 160mm
S, M, M/L, L, XL
Shimano RT76, 6-bolt, 180mm
|Bag||Bontrager BITS Internal Frame Storage Bag|
|Weight||M - 12.61 kg / 27.81 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 & 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 noted.
|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|