Trek Top Fuel 9.8 XT Gen 4
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
| Frame Size | Small | Medium | Medium / Large | Large | X-Large |
|---|---|---|---|---|---|
| Geometry position | High / Low | High / Low | High / Low | High / Low | High / Low |
| Wheel size | 29" | 29" | 29" | 29" | 29" |
| Seat tube (cm) | 36 | 41 | 42 | 43.5 | 47 |
| Seat tube angle | 69.5° / 69° | 70.5° / 70° | 70.5° / 70° | 70.5° / 70° | 70.5° / 70° |
| Effective seat tube angle | 76.5° / 76° | 77.3° / 76.9° | 76.6° / 76.2 | 76.3° / 75.9° | 75.6° / 75.2° |
| Head tube length (cm) | 10.5 | 10.5 | 11 | 11.5 | 13.5 |
| Head angle | 65.9° / 65.5° | 65.9° / 65.5° | 65.9° / 65.5 | 65.9° / 65.5° | 65.9° / 65.5° |
| Effective top tube (cm) | 55.8 / 55.9 | 58.7 / 58.8 | 61.1 / 61.2 | 63 / 63.1 | 67.2 / 67.3 |
| Bottom bracket drop (cm) | 1 / 1.6 | 2.6 / 3.2 | 2.6 / 3.2 | 2.6 / 3.2 | 2.6 / 3.2 |
| Chainstay length (cm) | 43.4 / 43.5 | 43.4 / 43.5 | 43.9 / 44 | 43.9 / 44 | 44.4 / 44.5 |
| Offset (cm) | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 |
| Trail (cm) | 11.1 / 11.5 | 12.1 / 12.5 | 12.1 / 12.5 | 12.1 / 12.5 | 12.1 / 12.5 |
| Wheelbase (cm) | 115 / 115.1 | 118.8 / 118.8 | 121 / 121 | 122.7 / 122.7 | 127 / 127.1 |
| Standover (cm) | 70.5 / 70 | 75.5 / 75 | 75.7 / 75.2 | 75.8 / 75.3 | 76.3 / 75.8 |
| Frame reach (cm) | 42.2 / 41.7 | 45.2 / 44.7 | 46.7 / 46.2 | 48.2 / 47.7 | 51.2 / 50.7 |
| Frame stack (cm) | 56.6 / 57 | 59.9 / 60.3 | 60.4 / 60.7 | 60.8 / 61.2 | 62.6 / 63 |
| Frame Size | Rider Height (cm)Rider HEight (cm) | Rider Height (in) |
|---|---|---|
| Small | 155 - 165 | 5'1" - 5'5" |
| Medium | 165 - 176 | 5'5" - 5'9" |
| Medium / Large | 173 - 180 | 5'8" - 5'11" |
| Large | 177 - 188 | 5'10" - 6'2" |
| X-Large | 188 - 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.