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Trek Top Fuel 9.8 XT Gen 4

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Details

Top Fuel 9.8 XT Gen 4 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 120mm/130mm RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you get clean shifts from a 12-speed Shimano XT drivetrain.

IT'S RIGHT FOR YOU IF…
You're after a carbon trail bike that keeps weight to a minimum without compromising on capability. You like to ride everything – long alpine climbs, rooty aspen slalom, fast XC singletrack, and you want a bike that can keep up on the ups and hold its own on the downs. Keeping things light with a carbon frame is important to you, and you want the light yet precise shifting of a Shimano XT drivetrain.

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

THE FINAL WORD
If you're after a light carbon trail bike that balances a playful and capable ride, reach for Top Fuel 9.8 XT Gen 4. Its ultra-lightweight frame pairs with a 4-way Mino Link lower suspension mount for taking control of your geometry and suspension feel. Plus, you get clean shifts from a Shimano XT drivetrain and a sweet RockShox suspension package.

WHY YOU'LL LOVE IT
- 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 120mm rear and 130mm 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
- In-frame storage with an improved BITS bag system makes it easy to stash tools, tubes, and snacks
- It's more upgrade-ready than ever, with room for bigger 140mm forks and longer-stroke shocks for up to 130mm of rear travel, plus room for extra-long dropper posts

Sizes:
Frame SizeSmallMediumMedium / LargeLargeX-Large
Geometry positionHigh / Low High / LowHigh / LowHigh / LowHigh / Low
Wheel size29" 29"29"29"29"
Seat tube (cm)36 414243.547
Seat tube angle69.5° / 69° 70.5° / 70°70.5° / 70°70.5° / 70°70.5° / 70°
Effective seat tube angle76.5° / 76° 77.3° / 76.9°76.6° / 76.276.3° / 75.9°75.6° / 75.2°
Head tube length (cm)10.5 10.51111.513.5
Head angle65.9° / 65.5° 65.9° / 65.5°65.9° / 65.565.9° / 65.5°65.9° / 65.5°
Effective top tube (cm)55.8 / 55.9 58.7 / 58.861.1 / 61.263 / 63.167.2 / 67.3
Bottom bracket drop (cm)1 / 1.6 2.6 / 3.22.6 / 3.22.6 / 3.22.6 / 3.2
Chainstay length (cm)43.4 / 43.5 43.4 / 43.543.9 / 4443.9 / 4444.4 / 44.5
Offset (cm)4.3 4.34.34.34.3
Trail (cm)11.1 / 11.5 12.1 / 12.512.1 / 12.512.1 / 12.512.1 / 12.5
Wheelbase (cm)115 / 115.1 118.8 / 118.8121 / 121122.7 / 122.7127 / 127.1
Standover (cm)70.5 / 70 75.5 / 7575.7 / 75.275.8 / 75.376.3 / 75.8
Frame reach (cm)42.2 / 41.7 45.2 / 44.746.7 / 46.248.2 / 47.751.2 / 50.7
Frame stack (cm)56.6 / 57 59.9 / 60.360.4 / 60.760.8 / 61.262.6 / 63
Sizes:
Frame SizeRider Height (cm)Rider HEight (cm)Rider Height (in)
Small155 - 165 5'1" - 5'5"
Medium165 - 176 5'5" - 5'9"
Medium / Large173 - 180 5'8" - 5'11"
Large177 - 188 5'10" - 6'2"
X-Large188 - 195 6'2" - 6'5"

Specs

Pedals Sold Separately
Chain Shimano Ultegra/XT M8100, 12 speed
Frame OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120mm travel
Tires Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'' // Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
Brakes Shimano XT M8120 4-piston hydraulic disc // Shimano XT M8120 4-piston hydraulic disc
Rotors Shimano RT86, 6-bolt, 180mm
Saddle Verse Short Comp, steel rails, 145mm width
Wheels Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''
Crankset Shimano XT M8120, 30T, 55mm chainline, 170mm length
Seatpost Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length
Shifters Shimano XT M8100, 12 speed
Rear Shock RockShox Deluxe Ultimate RCT, 185mm x 50mm
Tape/Grips Bontrager XR Trail Elite, nylon lock-on
Bottom Bracket Shimano BB-MT501 BSA
Rear Derailleur Shimano XT M8100, long cage
Cassette/Freewheel Shimano XT M8100, 10-51, 12 speed

* Subject to change without notice.