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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, 115mm of rear travel with a RockShox SID Luxe Ultimate shock, and a new Shimano XT 1x12 drivetrain. Plus, wide carbon Bontrager Kovee Elite 30 wheels with a 54-tooth Rapid Drive hub for fast engagement, 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.
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 downtube for extra-stiff, responsive handling without added weight, and a Knock Block headset that protects against spinning bars and fork crowns
- Bontrager DropLock's shifter-style lever lets you easily lock out both front and rear shocks at the same time for added sprinting or climbing efficiently. Plus, it controls your dropper post too
- Wider Kovee Elite 30 wheels provide better tire support so you can run lower pressure and get more traction
- This short-travel bike has a killer suspension setup reminiscent of the all-mighty mullet—it's both efficient and ready to party
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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.
Straight Shot downtube
Straight Shot downtube gives you an extra-stiff frame without adding any weight, so you can stick your line through the rough stuff and still fly up the next climb.
Rapid Drive 108 rear hub
With 108 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.
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.
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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.
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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.
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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.
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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.
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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.
Blendr-compatible stem
Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.
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Specifications
*spec applies to all sizes unless otherwise noted
| Fork | RockShox SID Select+, DebonAir spring, Charger 2 RL damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel |
|---|---|
| Shock | RockShox SID Luxe Ultimate, DebonAir spring, Ultimate RL damper, 190x45mm |
| Suspension lever | Bontrager Drop Lock remote |
| 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 |
| Front hub | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm 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 |
Size:
S, M, M/L, L, XL Bontrager TLR valve, 50mm |
|
Size:
S, M, M/L, L, XL Bontrager TLR sealant |
|
| Rim strip | Bontrager TLR |
| 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 |
| 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 |
| Grips | Bontrager XR Trail Elite, alloy lock-on |
| *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 M7000 hydraulic disc, 180mm front rotor, 160mm rear rotor |
| *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 - 11.83 kg / 26.08 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 | 68.0° | 56.3 | 34.3 | 3 | 43.4 | 4.4 | 10.3 | 111.7 | 73.1 | 41 | 59 |
| 15.5 | S | Low | 39.4 | 68.0° | 75.0° | 9 | 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 | Low | 41.9 | 68.0° | 75.0° | 9 | 67.5° | 59.9 | 33.7 | 3.6 | 43.5 | 4.4 | 10.7 | 115.2 | 73 | 44 | 59.4 |
| 17.5 | M | High | 41.9 | 68.5° | 75.5° | 9 | 68.0° | 59.8 | 34.3 | 3 | 43.4 | 4.4 | 10.3 | 115.2 | 73.6 | 44.5 | 59 |
| 18.5 | ML | High | 44.5 | 68.5° | 75.5° | 9 | 68.0° | 61.4 | 34.3 | 3 | 43.4 | 4.4 | 10.3 | 116.8 | 74.1 | 46.1 | 59 |
| 18.5 | ML | Low | 44.5 | 68.0° | 75.0° | 9 | 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 | 68.5° | 75.5° | 10 | 68.0° | 63 | 34.3 | 2.9 | 43.4 | 4.4 | 10.3 | 118.5 | 75.1 | 47.5 | 59.9 |
| 19.5 | L | Low | 47 | 68.0° | 75.0° | 10 | 67.5° | 63.2 | 33.7 | 3.6 | 43.5 | 4.4 | 10.7 | 118.6 | 74.5 | 47 | 60.3 |
| 21.5 | XL | High | 52.1 | 68.5° | 75.5° | 11 | 68.0° | 65 | 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 | 67.5° | 65.1 | 33.7 | 3.6 | 43.5 | 4.4 | 10.7 | 120.7 | 76.5 | 48.7 | 61.2 |