Trek Top Fuel 9.8 2026 Mountain Bike

The Top Fuel 9.8 is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. It gives you the confidence you want through roots and rocks, thanks to a 120 mm/130 mm (rear/front) RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you get ultra-smooth and fast shifts from a 12-speed Shimano XT Di2 wireless drivetrain.

An OCLV Mountain Carbon frame with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. A 130 mm RockShox Pike Select+ fork with DebonAir spring, and Charger 3.1 RC2 damper, plus 120 mm of rear travel from a RockShox Deluxe Ultimate RCT shock. Shimano's all-new XT Di2 wireless 12-speed drivetrain, Shimano XT 4-piston hydraulic brakes, Bontrager Line dropper post, and tubeless-ready Bontrager Line Comp 30 wheels.

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## Key Features

* Upgraded components, like the iconic Shimano XT Di2 wireless drivetrain and a RockShox suspension package make this Top Fuel ride like a dream
* The Top Fuel Gen 4 delivers with an intensely lightweight build, improved in-frame storage and more adjustability for all kinds of rides and riders
* With 120 mm rear and 130 mm front RockShox suspension, it delivers a well-balanced ride that stays efficient on the ups and playful on descents
* The 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride
* It's more upgrade-ready than ever, with room for bigger 140 mm forks and longer-stroke shocks for up to 130 mm of rear travel, plus room for extra-long dropper posts

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## Specifications

### Frameset

* Frame: OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120 mm travel
* Fork: RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 130 mm travel
* Rear Shock: RockShox Deluxe Ultimate RCT, 185 mm x 50 mm

### Wheels

* Rims: Bontrager TLR
* Tyres: Bontrager Gunnison RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 29x2.40

### Drivetrain

* Crankset: Shimano XT 8200, 30T, 55 mm chain-line, 170 mm length
* Shifters: Shimano XT Di2 M8250, 12-speed
* Rear Derailleur: Shimano XT M8250, long cage
* Chain: Shimano XT M8100, 12-speed
* Cassette: Shimano XT M8200, 10-51, 12-speed
* Bottom Bracket: Shimano BB-MT501 BSA

### Components

* Handlebar: Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise
* Stem: Bontrager Line Pro, 35 mm, Blendr-compatible, 0-degree
* Grips: Trek Line Elite, lock-on
* Brakes: Shimano XT M8200 4-piston hydraulic disc
* Saddle: Verse Short Comp, steel rails, 145 mm width
* Seatpost: Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm

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## Trek Marlin Sizing

| | XXS | XS | S | M | ML | L | XL | XXL |
| ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- |
| Rider Height (cm) | 135 - 145 | 145 - 155 | 155 - 165 | 165 - 176 | 173 - 180 | 177 - 188 | 188 - 195 | 195 - 203 |
| Inseam (cm) | 64 - 68 | 69 - 73 | 74 - 78 | 79 - 83 | 81 - 86 | 84 - 89 | 89 - 91 | 91 - 97 |