Trek Top Fuel 9.8 XT Gen 4 Mountain Bike 2025

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For the rider seeking a high-performance carbon trail bike, the Trek Top Fuel 9.8 XT Gen 4 Mountain Bike 2025 offers a lightweight design without sacrificing capability. It is versatile enough to handle a variety of terrain, from alpine climbs to XC singletrack, and maintains a reliable and efficient ride with its Shimano XT drivetrain. With a carbon frame, this bike prioritizes lightweight construction for an optimized riding experience.

The Trek Top Fuel 9.8 XT Gen 4 Mountain Bike 2025 features an OCLV Mountain Carbon frame paired with a 4-way Mino Link lower shock mount to enable precise adjustments to the geometry and suspension leverage rate. Its 130 mm RockShox Pike Select+ fork boasts a DebonAir spring and a Charger 3.1 RC2 damper, while the RockShox Deluxe Ultimate RCT shock provides 120 mm of rear travel. The bike also comes with a Shimano XT 12-speed drivetrain, Shimano XT 4-piston hydraulic brakes, a Bontrager Line dropper post, and tubeless-ready Bontrager Line Comp 30 wheels.

For a versatile carbon mountain bike with a playful yet capable ride, consider the Top Fuel 9.8 XT Gen 4. The lightweight frame, coupled with a 4-way Mino Link lower suspension mount, allows you to easily adjust your geometry and suspension for optimal performance. Additionally, the Shimano XT drivetrain and RockShox suspension package provide smooth and precise shifting.

• 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
  
• Shock RockShox Deluxe Ultimate RCT, 185 mm x 50 mm
  
• *Wheel front    
• Size: S Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"
• Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29"
  
• *Wheel rear    
• Size: S Bontrager Line Comp 30, High Strength 6000 Series Aluminium rim, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru axle, 27.5"
  
• Size: M, ML, L, XL Bontrager Line Comp 30, High Strength 6000 Series Aluminium rim, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru axle, 29"
  
• Skewer rear Bontrager Switch thru-axle, removable lever
  
• *Tyre    
• Size: S Bontrager Gunnison RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40"
  
• Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 29x2.40"
  
• Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 29x2.40"
  
• Rim strip Bontrager TLR
  
• Shifter Shimano XT M8100, 12-speed
  
• Rear derailleur Shimano XT M8100, long cage
  
• Crank Shimano XT M8120, 30T, 55 mm chain line, 170 mm length
  
• Bottom bracket Shimano BB-MT501 BSA
  
• Cassette Shimano XT M8100, 10-51, 12-speed
  
• Chain Shimano Ultegra/XT M8100, 12-speed
  
• Saddle Verse Short Comp, steel rails, 145 mm width
• *Seatpost    
• Size: S Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length
• Size: M, ML, L, XL Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length
• *Handlebar/stem (integrated)    
• Size: S Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5 mm handlebar rise, 820 mm width, 0-degree stem rise, 35 mm stem length
  
• Size: M, ML, L, XL Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5 mm handlebar rise, 820 mm width, 0-degree stem rise, 45mm stem length
  
• Grips Bontrager XR Trail Elite, nylon lock-on
  
• Brake Shimano XT M8120 4-piston hydraulic disc
  
• Brake rotor Shimano RT86, 6-bolt, 180 mm
  
• Bag Bontrager BITS Internal Frame Storage Bag
• Weight M - 13.45 kg / 29.66 lbs (with TLR sealant, no tubes)

Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).