Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2025 Trek Top Fuel 9.8 GX AXS Gen 4
Value Guide market data · 2025 Trek Top Fuel 9.8 GX AXS Gen 4
12-month trend
22%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2025 Trek Top Fuel 9.8 GX AXS Gen 4
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Top Fuel model years
2026$9,300 - $10,8000% vs. 2025
2025$9,300 - $10,800Currently viewing
2024$9,300 - $10,8000% vs. 2025
2023$9,300 - $10,8000% vs. 2025
2022$9,021 - $10,476▼ 3% vs. 2025
2021$9,300 - $10,8000% vs. 2025
2020$9,765 - $11,340▲ 5% vs. 2025
2019$2,930 - $3,402▼ 68% vs. 2025
2018$3,720 - $4,320▼ 60% vs. 2025
2017$2,511 - $2,916▼ 73% vs. 2025
2016$2,418 - $2,808▼ 74% vs. 2025
2011$4,101 - $4,763▼ 56% vs. 2025
2010$2,930 - $3,402▼ 68% vs. 2025
2009$3,069 - $3,564▼ 67% vs. 20252025 Top Fuel 9.8 GX AXS Gen 4 lineup
Overview
About this bike
2025 Trek Top Fuel 9.8 GX AXS Gen 4 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Rear Shock
- RockShox Deluxe Ultimate RCT, 185mm x 50mm
- Fork
- RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
- Frame
- OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120mm travel
Drivetrain
- Groupset
- 2025 Trek Top Fuel 9.8 GX AXS Gen 4
- Crankset
- SRAM GX Eagle, T-Type, DUB, 30T, 55mm chainline, 170mm length
- Bottom Bracket
- SRAM DUB MTB Wide, 73mm, BSA threaded
- Chain
- SRAM GX Eagle, T-Type, 12 speed
- Rear Derailleur
- SRAM GX Eagle AXS, T-Type
- Shifters
- SRAM AXS POD
- Cassette/Freewheel
- SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
Brakes
- Brakes
- SRAM Level Bronze 4-piston hydraulic disc // SRAM Level Bronze 4-piston hydraulic disc
- Rotors
- SRAM CenterLine, 6-bolt, round edge, 180mm
Cockpit
- Seatpost
- Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length
- Saddle
- Verse Short Comp, steel rails, 145mm width
- Handlebar
- Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 45mm stem length
- Tape/Grips
- Bontrager XR Trail Elite, nylon lock-on
Wheels & Tires
- Rear Tire
- Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'' // Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
- Wheel Size
- 29-inch / 27.5-inch
- Front Tire
- Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'' // Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
- Wheel Set
- Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD freehub, Boost148, 12mm thru axle, 29''
Pedals
- Pedals
- Sold Separately
Accessories
- Color
- Lunar Silver / Matte Dark Web
Weight & Sizing
- Size
- Small / Medium / Medium/Large / Large / X-Large
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.