Trek Top Fuel 9.9 XTR Di2 Gen 4
$6,299.00
The Trek Top Fuel 9.9 XTR Di2 Gen 4 is a trail mountain bike built around an OCLV Mountain Carbon frame with 120mm rear travel, a 130mm suspension fork, Shimano XTR Di2 12-speed shifting, Bontrager Line Pro 30 carbon wheels, and Shimano XTR 4-piston hydraulic disc brakes.
| Color | Dark Star |
|---|
Trek Top Fuel 9.9 XTR Di2 Gen 4 Overview
The Trek Top Fuel 9.9 XTR Di2 Gen 4 is a carbon full-suspension trail mountain bike with 120mm rear travel and a 130mm suspension fork. Its OCLV Mountain Carbon frame includes internal storage, internal guided routing, a downtube guard, an alloy rocker link, 4-way Mino Link adjustment, ABP suspension design, and Boost148 spacing.
The build uses Shimano XTR Di2 M9250 12-speed shifting with a Shimano XTR M9200 10-51 cassette and Shimano XTR M9100 chain. Braking is handled by Shimano XTR M9220 4-piston hydraulic disc brakes with Shimano MT905 180mm rotors. Bontrager Line Pro 30 OCLV Mountain Carbon wheels keep the build focused on premium trail performance, with size-specific wheel setups across the range.
Key Features of Trek Top Fuel 9.9 XTR Di2 Gen 4
- OCLV Mountain Carbon frame combines a carbon chassis with internal storage, guided routing, and a downtube guard.
- 120mm rear travel and 130mm fork travel support the bike’s trail mountain bike setup.
- Shimano XTR Di2 M9250 12-speed shifting delivers an electronic drivetrain with a long cage rear derailleur.
- Shimano XTR M9200 10-51 cassette gives the bike a wide 12-speed gear range.
- Shimano XTR M9220 4-piston hydraulic disc brakes provide controlled braking with 180mm Shimano MT905 rotors.
- Bontrager Line Pro 30 OCLV Mountain Carbon wheels are Tubeless Ready and use Boost hub spacing.
- Size-specific wheel setup uses 27.5″ wheels on size S and 29″ wheels on sizes M, ML, L, and XL.
- Fox Transfer NEO seatpost comes with size-specific travel from 150mm to 200mm.
Ride Use
This bike is built for trail mountain biking, supported by a full-suspension OCLV Mountain Carbon frame, 120mm rear travel, and a 130mm suspension fork. The Shimano XTR Di2 drivetrain, 4-piston hydraulic disc brakes, carbon wheels, and tubeless-ready tires make it suitable for riders looking for a premium trail-focused build.
Why Choose This Bike
The Trek Top Fuel 9.9 XTR Di2 Gen 4 brings together a carbon full-suspension trail frame, electronic Shimano XTR Di2 shifting, Shimano XTR 4-piston braking, and Bontrager Line Pro 30 carbon wheels in one complete build. The Dark Star color, size-specific wheels, Fox Factory shock, premium cockpit parts, and Fox Transfer NEO dropper post give the bike a detailed, high-end specification without unsupported claims. Trek frames and full-suspension swing arms are covered for the lifetime of the original owner, with other parts covered under Trek’s limited warranty.
Product Specifications
| Feature | Details |
|---|---|
| Brand | Trek |
| Model | Top Fuel 9.9 XTR Di2 Gen 4 |
| Bike Type | Trail Mountain Bike |
| Color | Dark Star |
| Frame | OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel |
| Fork | Size S: RockShox Pike Ultimate, 130mm travel; Size M, ML, L, XL: Fox Factory 36 SL, 130mm travel |
| Shock | Fox Factory Float, 2-position damper, 185mm x 50mm |
| Shifter | Shimano XTR Di2 M9250, 12-speed |
| Rear Derailleur | Shimano XTR Di2 M9250, long cage |
| Crank | E*thirteen Helix Race Carbon, 30T, 55mm chainline, 170mm length |
| Bottom Bracket | E*thirteen BB20-P, BSA threaded, 73mm width |
| Cassette | Shimano XTR M9200, 10-51, 12-speed |
| Chain | Shimano XTR M9100, 12-speed |
| Brakes | Shimano XTR M9220 4-piston hydraulic disc |
| Brake Rotors | Shimano MT905, 6-bolt, 180mm |
| Wheels | Bontrager Line Pro 30 OCLV Mountain Carbon, Tubeless Ready |
| Wheel Size | Size S: 27.5"; Size M, ML, L, XL: 29" |
| Tires | Bontrager Gunnison RSL XT and Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi |
| Handlebar | Bontrager Line Pro OCLV Carbon, 35mm, 27.5mm rise, 780mm width |
| Stem | Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length |
| Saddle | Verse Short Pro, carbon rails, 145mm width |
| Seatpost | Fox Transfer NEO, 150mm travel on S and M, 175mm travel on ML, 200mm travel on L and XL |
| Weight | M - 13.10 kg / 28.88 lbs with TLR sealant, no tubes |
| Weight Limit | 300 pounds / 136 kg combined weight of bicycle, rider, and cargo |
| Manufacturer Warranty | Trek frames and full-suspension swing arms are covered for the lifetime of the original owner. Other parts are covered under Trek’s limited warranty. |
FAQ's Trek Top Fuel 9.9 XTR Di2 Gen 4
What frame does the Trek Top Fuel 9.9 XTR Di2 Gen 4 use?
The bike uses an OCLV Mountain Carbon frame with 120mm travel. The frame includes internal storage, a tapered head tube, internal guided routing, a downtube guard, an alloy rocker link, 4-way Mino Link, ABP, and Boost148 spacing.
What drivetrain comes on the Trek Top Fuel 9.9 XTR Di2 Gen 4?
This model uses Shimano XTR Di2 M9250 12-speed shifting with a Shimano XTR Di2 M9250 long cage rear derailleur. It also includes a Shimano XTR M9200 10-51 12-speed cassette, Shimano XTR M9100 chain, and E*thirteen Helix Race Carbon crank.
What wheel size does the Trek Top Fuel 9.9 XTR Di2 Gen 4 have?
Size S uses 27.5" Bontrager Line Pro 30 OCLV Mountain Carbon wheels. Sizes M, ML, L, and XL use 29" Bontrager Line Pro 30 OCLV Mountain Carbon wheels.
What is the weight of the Trek Top Fuel 9.9 XTR Di2 Gen 4?
The size M bike weighs 13.10 kg / 28.88 lbs with TLR sealant and no tubes. The maximum total weight limit is 300 pounds / 136 kg, including the bicycle, rider, and cargo.
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