Trek Top Fuel 9.9 XTR Gen 4
Trek Top Fuel 9.9 XTR Gen 4
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Trek Top Fuel 9.9 XTR Gen 4
Product Introduction
The Trek Top Fuel 9.9 XTR Gen 4 is an exceptionally lightweight full-suspension mountain bike engineered for riders who demand speed, efficiency, and precision on technical cross-country and down-country trails. Built around Trek's premium OCLV Mountain Carbon frame, it combines race-inspired performance with trail capability, delivering an agile and confidence-inspiring ride.
Designed for fast climbing, confident descending, and all-day adventures, the Top Fuel 9.9 XTR Gen 4 features premium suspension, Shimano's flagship XTR 12-speed drivetrain, and high-performance carbon wheels for an uncompromising riding experience.
Whether you're racing, exploring demanding singletrack, or pushing your limits on technical terrain, the Top Fuel 9.9 XTR Gen 4 delivers world-class performance with exceptional efficiency and control.
Highlights
- Premium OCLV Mountain Carbon Frame — Lightweight, responsive and engineered for maximum stiffness while maintaining exceptional comfort.
- Shimano XTR 12-Speed Drivetrain — Professional-level shifting performance with exceptional precision, reliability and durability.
- FOX Factory Suspension — Smooth suspension performance offering outstanding traction and control over technical terrain.
- Carbon Wheelset — Lightweight carbon wheels improve acceleration, climbing efficiency and handling precision.
- Trail Geometry — Modern geometry provides confidence on descents while remaining exceptionally efficient on climbs.
- Internal Cable Routing — Clean aesthetics with reduced maintenance and improved protection.
Frame & Suspension
The OCLV Mountain Carbon frame pairs 120 mm of rear travel with a 130 mm FOX Factory 34 Float fork and a FOX Factory Float DPS rear shock, absorbing technical terrain while keeping the bike sharp and efficient under power.
Drivetrain & Brakes
Shimano's flagship XTR M9100 12-speed groupset delivers professional-level shifting precision across a wide 10–51T cassette, matched with XTR hydraulic disc brakes for confident, responsive stopping power on demanding descents.
Wheels & Contact Points
Bontrager Carbon wheels wrapped in Bontrager XR4 Team Issue tubeless-ready tyres reduce rotational weight for faster acceleration and climbing efficiency, while the Bontrager Line dropper post, carbon handlebar and Elite stem complete a race-ready cockpit.
Technical Specifications
| Brand | Trek |
| Model | Top Fuel 9.9 XTR Gen 4 |
| Frame | OCLV Mountain Carbon |
| Fork | FOX Factory 34 Float |
| Rear Shock | FOX Factory Float DPS |
| Rear Travel | 120 mm |
| Front Travel | 130 mm |
| Drivetrain | Shimano XTR M9100 12-Speed |
| Crankset | Shimano XTR |
| Cassette | Shimano XTR 10–51T |
| Brakes | Shimano XTR Hydraulic Disc |
| Wheelset | Bontrager Carbon |
| Tyres | Bontrager XR4 Team Issue Tubeless Ready |
| Seatpost | Bontrager Line Dropper |
| Handlebar | Bontrager Carbon |
| Stem | Bontrager Elite |
| Weight | Approximately 11.8 kg |
Weight may vary depending on frame size and final specification.
Why Choose This Bike?
The Trek Top Fuel 9.9 XTR Gen 4 pairs an ultra-light OCLV Mountain Carbon frame with FOX Factory suspension, Shimano's flagship XTR 12-speed drivetrain and a full Bontrager carbon cockpit — a combination built for riders who want race-day efficiency without sacrificing trail confidence. Whether climbing, racing or pushing through technical singletrack, this is a bike engineered to reward precision with performance.