Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2026 Trek Top Fuel 9.9 XTR Di2 Gen 4
Estimated used market value
$7,297 - $7,507
Actual value depends on condition, size, and local demand.
Value Guide market data · 2026 Trek Top Fuel 9.9 XTR Di2 Gen 4
12-month projected trend
6%
Direction and magnitude, not judgment
vs. category average
34%
Drops faster than category avg
Price over time - 2026 Trek Top Fuel 9.9 XTR Di2 Gen 4
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Top Fuel model years
Compare Top Fuel 9.9 XTR Di2 Gen 4 models
1 modelsChoose a different build or frame style to see its value.
Overview
About this bike
Top Fuel 9.9 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 (rear/front) RockShox suspension package with a Pike Ultimate fork and Deluxe Ultimate shock. Plus, you get confident lightning-fast shifting from Shimano's all-new, iconic XTR Di2 wireless drivetrain. 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 is critical, so you want a carbon frame and the cream of the crop parts, like an all-new, ultra-smooth Shimano XTR Di2 drivetrain. 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 Ultimate fork with DebonAir spring, and Charger 3.1 RC2 damper, plus 120mm of rear travel from a RockShox Deluxe Ultimate RCT shock. Shimano's all-new XTR Di2 12-speed drivetrain, Shimano XTR M9220 hydraulic brakes, Bontrager Line dropper post, and tubeless-ready Bontrager Line Pro 30 OCLV Carbon wheels. If you're after a light carbon trail bike that balances a playful and capable ride, reach for Top Fuel 9.8 XTR 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 Shimano's new XTR Di2 wireless drivetrain and a sweet RockShox suspension package. - You get every performance advantage, thanks to Shimano's iconic XTR Di2 wireless drivetrain and an upgraded suspension package - 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 - It's more customizable 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 Wheel Sizing: Small: 27.5-inch front and rear Medium - X-Large: 29-inch front and rear
Specifications
- Subtype
- Cross Country
- Category
- Mountain
- Component Fork
- Size: S RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 44mm offset, Boost110, Maxle Stealth, 130mm travel | Size: M, ML, L, XL Fox Factory 36 SL, Float EVOL air spring, GRIP X damper, 44mm offset, Boost 110, 15mm Kabolt X axle, 130mm travel
- Component Size
- Small, Medium, Medium/Large, Large, X-Large
- Component Stem
- Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length
- Product Family
- Top Fuel
- Component Chain
- Shimano XTR M9100, 12 speed
- Component Color
- Dark Star
- Component 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
- Component Brakes
- Shimano XTR M9220 4-piston hydraulic disc
- Component Pedals
- Sold Separately
- Component Saddle
- Verse Short Pro, carbon rails, 145mm width
- Component Crankset
- E*thirteen Helix Race Carbon, 30T, 55mm chainline, 170mm length
- Component Seatpost
- Size: S , M Fox Transfer NEO, 150mm travel, 34.9, Size: ML Fox Transfer NEO, 175mm travel, 34.9, Size: L, XL Fox Transfer NEO, 200mm travel, 34.9
- Component Shifters
- Shimano XTR Di2 M9250, 12 speed
- Component Handlebar
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Component Rear Tire
- Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40'', Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'', Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
- Component Wheel Set
- Front: Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'', Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' Rear: Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 27.5'', Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''
- Component Front Tire
- Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40'', Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'', Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
- Component Rear Shock
- Fox Factory Float, 2- position damper, 185mm x 50mm
- Component Tape Grips
- Trek Line Elite, lock-on
- Component Bottom Bracket
- E*thirteen BB20-P, BSA threaded, 73mm width
- Component Rear Derailleur
- Shimano XTR M9250, long cage
- Component Cassette Freewheel
- Shimano XTR M9200, 10-51, 12 speed
- Rear Shock
- Fox Factory Float, 2- position damper, 185mm x 50mm
- Crankset
- E*thirteen Helix Race Carbon, 30T, 55mm chainline, 170mm length
- Pedals
- Sold Separately
- Bottom Bracket
- E*thirteen BB20-P, BSA threaded, 73mm width
- Chain
- Shimano XTR M9100, 12 speed
- Seatpost
- Size: S , M Fox Transfer NEO, 150mm travel, 34.9, Size: ML Fox Transfer NEO, 175mm travel, 34.9, Size: L, XL Fox Transfer NEO, 200mm travel, 34.9
- Saddle
- Verse Short Pro, carbon rails, 145mm width
- Handlebar
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Rear Derailleur
- Shimano XTR M9250, long cage
- Rear Tire
- Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40'', Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'', Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
- Stem
- Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length
- Brakes
- Shimano XTR M9220 4-piston hydraulic disc
- Fork
- Size: S RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 44mm offset, Boost110, Maxle Stealth, 130mm travel | Size: M, ML, L, XL Fox Factory 36 SL, Float EVOL air spring, GRIP X damper, 44mm offset, Boost 110, 15mm Kabolt X axle, 130mm travel
- 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
- Shifters
- Shimano XTR Di2 M9250, 12 speed
- Tape/Grips
- Trek Line Elite, lock-on
- Color
- Dark Star
- Size
- X-Large
- Cassette/Freewheel
- Shimano XTR M9200, 10-51, 12 speed
- Wheel Set
- Front: Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'', Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' Rear: Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 27.5'', Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''
- Front Tire
- Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40'', Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'', Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.