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.
A light and stiff full carbon frame, 120mm RockShox SID Select+ fork, 120mm of rear travel with a SID Luxe shock, and a SRAM GX Eagle 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.
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.
- 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
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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.
Learn more
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.
Internal frame storage makes it easy to ditch the pack and still carry your ride essentials.
Watch the video
Guided internal cable routing keeps Top Fuel quiet on the trail and maintenance a breeze.
Learn more
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.
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.
Learn more
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
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.
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.
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.
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
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
*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, SRAM XD driver, 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, 108T Rapid Drive, SRAM XD driver, 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 |
SRAM GX Eagle, 12 speed |
| Rear derailleur |
SRAM GX Eagle |
| *Crank |
Size:
S, M, M/L, L
SRAM GX Eagle, DUB MTB Wide, 30T, 55mm chainline, 170 length |
Size:
XL
SRAM GX Eagle, DUB MTB Wide, 30T, 55mm chainline, 175 length |
| Bottom bracket |
SRAM DUB MTB Wide, 73mm, 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, 138mm width |
| *Seatpost |
Size:
S
Bontrager Line Elite Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 345mm length
|
Size:
M, M/L
Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length
|
Size:
L
Bontrager Line Elite Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 485mm length
|
Size:
XL
Bontrager Line Elite Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 550mm length
|
| *Handlebar |
Size:
S
Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width
|
Size:
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 |
SRAM G2 RS 4-piston hydraulic disc |
| *Brake rotor |
Size:
S, M, M/L, L, XL
SRAM CenterLine, 6-bolt, round-edge, 160mm
|
Size:
S, M, M/L, L, XL
SRAM CenterLine, 6-bolt, round edge, 180mm
|
| Weight |
M - 12.45 kg / 27.45 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). |
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Prices shown are manufacturer's suggested retail prices.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
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.
| 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 |
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