Trek Top Fuel 9.8 XT Di2 Gen 4 Carbon Trail MTB
Shimano XT Di2 12 speed shifting with a 10 to 51 cassette equips the Trek Top Fuel 9.8 Gen 4 trail mountain bike.
- The OCLV Mountain Carbon frame has 120 mm travel.
- The RockShox Pike Select+ fork provides 130 mm travel.
- Shimano XT M8220 four piston brakes use hydraulic discs.
- Bontrager Line Comp 30 wheels are tubeless ready.
- The Bontrager Line Dropper seatpost uses internal routing.
- Ready to Ride guarantee 100% Built.
- Safe International Doorstep Bike Shipping.
Description
Need electronic Di2 precision and versatile 120mm down-country performance? The Trek Top Fuel 9.8 XT Di2 Gen 4 carbon trail mountain bike delivers 120mm of rear travel paired with a 130mm RockShox Pike Select+ fork and a RockShox Deluxe Ultimate RCT rear shock. The OCLV Mountain Carbon chassis includes 4-way Mino Link adjustability and internal frame storage.
This complete build contains a Shimano XT Di2 M8250 12-speed electronic drivetrain, Shimano XT M8220 4-piston hydraulic brakes with 180mm RT86 rotors, Bontrager Line Comp 30 wheels on Rapid Drive 108 hubs, Bontrager Gunnison and Montrose RSL XT tires, Bontrager Line Pro carbon handlebar, and a Bontrager Line dropper post. Available in Dark Star and Matte Sedona Red, pedals are sold separately.
Key Specifications of the Trek Top Fuel 9.8 XT Di2 Gen 4 Trail MTB
- OCLV Mountain Carbon frame delivers 120mm of rear suspension travel.
- RockShox Pike Select+ suspension fork provides 130mm of front travel.
- RockShox Deluxe Ultimate RCT rear shock measures 185mm by 50mm.
- Shimano XT Di2 M8250 electronic 12-speed drivetrain shifts a 10-51T cassette.
- Shimano XT M8220 4-piston hydraulic disc brakes clamp 180mm RT86 rotors.
- Bontrager Line Comp 30 wheels feature Rapid Drive 108 engagement.
- Bontrager Line Pro OCLV Carbon handlebar measures 780mm wide.
- Size S features 27.5-inch wheels while sizes M through XL use 29-inch wheels.
- Size Medium complete bike weighs 14.00 kg or 30.86 pounds.
- Total allowable system weight limit supports 300 pounds or 136 kg.
Who This Trail MTB Fits
Down-country riders, trail enthusiasts, and marathon cross-country cyclists seeking Shimano Di2 electronic shifting paired with a 130mm/120mm travel layout will match this build. The platform climbs efficiently while offering stability across rock gardens.
Compatibility and Installation
The chassis features a Shimano BB-MT501 BSA threaded bottom bracket, 55mm chainline, Boost148 rear hub spacing, and internal guided cable channels. The 4-way Mino Link enables geometry and leverage rate tuning to suit terrain.
Before Ordering the Trek Top Fuel 9.8 XT Di2 Gen 4 Trail MTB
Select frame sizes based on height: Small (27.5-inch wheels, 100mm dropper) fits 155 to 168 cm (5’1″ to 5’6″), Medium and ML (29-inch wheels, 170mm dropper) fit 168 to 181 cm (5’6″ to 5’11”), and Large/XL (29-inch wheels, 200mm dropper) fits 180 to 198 cm (5’11” to 6’6″). Remember to acquire a pair of trail pedals to complete your build.
Trek Top Fuel 9.8 XT Di2 Gen 4 Specs
| Brand | Trek |
| Model | Top Fuel 9.8 XT Di2 Gen 4 |
| Bike Type | Trail Mountain Bike |
| Color | Dark Star, Matte Sedona Red |
| 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 | RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel |
| Shock | RockShox Deluxe Ultimate RCT, 185mm x 50mm |
| Shifter | Shimano XT Di2 M8250, 12-speed |
| Rear Derailleur | Shimano XT M8250, long cage |
| Crank | Shimano XT 8200, 30T, 55mm chainline, 170mm length |
| Bottom Bracket | Shimano BB-MT501 BSA |
| Cassette | Shimano XT M8200, 10-51, 12-speed |
| Chain | Shimano Ultegra/XT M8100 |
| Brakes | Shimano XT M8220 4-piston hydraulic disc |
| Brake Rotors | Shimano RT86, 6-bolt, 180mm |
| Wheels | Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110 front, Boost148 rear, Rapid Drive 108 rear hub, Shimano Micro Spline freehub |
| Wheel Size | Size S: 27.5"; Size M, ML, L, XL: 29" |
| Tires | Size S: Bontrager Gunnison RSL XT 27.5x2.40"; Size M, ML, L, XL: Bontrager Gunnison RSL XT 29x2.40" and Bontrager Montrose RSL XT 29x2.40" |
| Tire Part | Bontrager TLR sealant, 6oz |
| Max Tire Size | Frame: 29x2.50"; Fork: see manufacturer |
| Handlebar | Bontrager Line Pro OCLV Carbon, 35mm, 27.5mm rise, 780mm width |
| Stem | Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length |
| Grips | Trek Line Elite, lock-on |
| Saddle | Verse Short Comp, steel rails, 145mm width |
| Seatpost | Bontrager Line Dropper, MaxFlow, internal routing, 34.9mm; 100mm travel on S, 170mm travel on M and ML, 200mm travel on L and XL |
| Weight | M - 14.00 kg / 30.86 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. |
Trek Top Fuel 9.8 XT Di2 Gen 4 Included:
- Shimano Di2 EW-EC300 electronic drivetrain battery charging cable.
- RockShox Pike Select+ 130mm fork and RockShox Deluxe Ultimate 120mm rear shock guide.
- Integrated downtube internal storage door and BITS internal frame bag.
- Bontrager Line Elite 30 OCLV Carbon wheelset tubeless valve stems and tire sealant.
- Shimano Deore XT 4-piston hydraulic disc brake caliper transport spacers.
- Bontrager Switch 12x148mm Boost rear thru-axle with removable lever.
- Safety reflector pack and standard bicycle bell.
- Bicycle User Manual Book.
- Official Manufacturer Warranty Card.
Trek Top Fuel 9.8 XT Di2 Gen 4 Carbon Trail MTB General Questions
Q: What terrain does the Top Fuel 9.8 XT Di2 conquer?A: The Trek Top Fuel 9.8 XT Di2 Gen 4 Carbon Trail MTB conquers fast downcountry trails, technical singletrack, and endurance loops with 130 mm front and 120 mm rear travel.
A: Charge the Di2 battery every 1,000 miles via the charging port, clean the 10-51T cassette with solvent, and customize shift modes via the Shimano E-Tube app.
A: The chassis is equipped with Shimano Deore XT M8120 4-piston hydraulic disc brakes on 180 mm rotors front and rear for consistent, low-effort stopping leverage.
A: The integrated downtube storage hatch encloses a BITS tool roll holding spare tubes, CO2 cartridges, and tire levers securely inside the carbon frame.
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