Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Fuel EX 9.8 GX Gen 5
Estimated used market value
$2,096 - $2,157
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Trek Fuel EX 9.8 GX Gen 5
12-month projected trend
12%
Direction and magnitude, not judgment
vs. category average
5%
Drops faster than category avg
Price over time - 2021 Trek Fuel EX 9.8 GX Gen 5
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Fuel model years
Overview
About this bike
Fuel EX 9.8 combines a light full-carbon frame with parts chosen for the highest performance-to-price ratio. High-end FOX suspension with upgraded front and rear dampers, carbon wheels with a Rapid Drive rear hub, and SRAM's latest, widest-range drivetrain give this model an extra edge you'll notice from the first pedal stroke. It's right for you if... You want a single bike that can handle any trail with the lightweight and vibration damping of a carbon frame. You're willing to pay for parts that give you a better connection with the trail, but you'd rather skip the bling. The tech you get A light and stiff full-carbon frame with internal storage, FOX Performance 36 fork with wider stanchions for more stiffness on rough terrain, and a RE:aktiv with Thru Shaft shock. SRAM GX Eagle drivetrain with a leg-saving 52-tooth climbing gear, plus Bontrager carbon wheels with a 108-tooth Rapid Drive hub for instant engagement. The final word Fuel EX 9.8 is a great investment for one bike that does it all. You get a light carbon frame, but it's the parts that make this model, like the extra-adjustable GRIP damper, the magic-carpet ride of Thru Shaft, and the blistering acceleration of carbon wheels with a Rapid Drive hub. Why you'll love it - Fuel EX 9.8 will take your riding to the next level with a parts package that gives you top-shelf performance without the top-shelf price tag - RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control - The Fox Performance 36 fork gives you four-way damping adjustments for extra-dialed suspension - We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5" wheels, S frames get to choose between 27.5" or 29", and sizes M to XL get 29" wheels Wheel size: - Sizes X-Small – Small: 27.5-inch - Sizes Small – XX-Large: 29-inch
Specifications
- Subtype
- Trail / Enduro
- Category
- Mountain
- Component Fork
- Fox Performance 36, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, 15mm Kabolt axle, 140mm travel
- Component Hubs
- Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, Boost148, 12mm thru-axle
- Component Size
- X-Small, Small, Medium, Medium/Large, Large, X-Large
- Component Stem
- Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, Size: XS, S Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 35mm length Size: M, ML, L, XL Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
- Product Family
- Fuel
- Component Axles
- Front: 110 x 15mm thru-axle Rear: 148 x 12mm thru-axle
- Component Chain
- SRAM GX Eagle, 12 speed
- Component Color
- Lithium Grey/Factory Orange, Matte Carbon Smoke, Raw Carbon/Rage Red, Satin Black Olive
- Component Frame
- OCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, ISCG 05, magnesium rocker link, Mino Link, ABP, 130mm travel
- Component Tires
- Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 TPI, 2.60 / 2.40"
- Component Brakes
- SRAM G2 RS 4-piston hydraulic disc w/SRAM CenterLine, 6-bolt, round-edge rotors, SRAM G2 RS 4-piston hydraulic disc Size: XS, S, M, ML, L, XL SRAM CenterLine, 6-bolt, round edge, 180mm Size: M, ML, L, XL SRAM CenterLine, 6-bolt, round edge, 200mm
- Component Pedals
- Sold separately
- Component Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Component Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Component Crankset
- SRAM GX Eagle, DUB, Boost (52mm chainline)
- Component Shifters
- SRAM GX Eagle, 12 speed
- Component Handlebar
- Size: XS, S, M, ML, L, XL Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width Size: XS, S Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width
- Component Rear Tire
- Size: XS, S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40" Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
- Component Seat Post
- Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm; XS – S: 100mm travel / M – ML: 150mm travel / L – XL: 170mm travel, Bontrager Line Elite, 100mm travel (Size XS-S), 150mm travel (Size M-ML), 175mm travel (Size L-XL)
- Component Chainrings
- 30T alloy ring
- Component Front Tire
- Size: XS, S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40" Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
- Component Handlebars
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Component Rear Shock
- Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab; XS – S: 210x52.5mm / M – XL: 210x55mm, Size: XS , S: Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 210mm x 52.5mm Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
- Component Tape Grips
- Bontrager XR Trail Elite, alloy lock-on, Size: XS, S, M, ML, L, XL Bontrager XR Trail Elite, nylon lock-on Size: XS, S, M, ML, L, XL Bontrager XR Trail Elite, alloy lock-on
- Component Wheel Size
- 27.5-inch, 29-inch
- Component Bottom Bracket
- SRAM DUB, 92mm, PressFit
- Component Rear Derailleur
- SRAM GX Eagle
- Component Accessories Extras
- Bontrager BITS Internal Frame Storage Bag
- Component Cassette Rear Cogs
- SRAM Eagle XG-1275, 10-52, 12 speed
- Rear Shock
- Size: XS , S: Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 210mm x 52.5mm Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
- Hubs
- Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, Boost148, 12mm thru-axle
- Tires
- Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 TPI, 2.60 / 2.40"
- Crankset
- SRAM GX Eagle, DUB, Boost (52mm chainline)
- Pedals
- Sold separately
- Bottom Bracket
- SRAM DUB, 92mm, PressFit
- Chain
- SRAM GX Eagle, 12 speed
- Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Handlebar
- Size: XS, S, M, ML, L, XL Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width Size: XS, S Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width
- Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Rear Derailleur
- SRAM GX Eagle
- Rear Tire
- Size: XS, S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40" Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
- Stem
- Size: XS, S Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 35mm length Size: M, ML, L, XL Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
- Accessories & Extras
- Bontrager BITS Internal Frame Storage Bag
- Axles
- Front: 110 x 15mm thru-axle Rear: 148 x 12mm thru-axle
- Brakes
- SRAM G2 RS 4-piston hydraulic disc Size: XS, S, M, ML, L, XL SRAM CenterLine, 6-bolt, round edge, 180mm Size: M, ML, L, XL SRAM CenterLine, 6-bolt, round edge, 200mm
- Chainrings
- 30T alloy ring
- Fork
- Fox Performance 36, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, 15mm Kabolt axle, 140mm travel
- Frame
- OCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, ISCG 05, magnesium rocker link, Mino Link, ABP, 130mm travel
- Handlebars
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Seat Post
- Bontrager Line Elite, 100mm travel (Size XS-S), 150mm travel (Size M-ML), 175mm travel (Size L-XL)
- Shifters
- SRAM GX Eagle, 12 speed
- Tape/Grips
- Size: XS, S, M, ML, L, XL Bontrager XR Trail Elite, nylon lock-on Size: XS, S, M, ML, L, XL Bontrager XR Trail Elite, alloy lock-on
- Color
- Satin Black Olive
- Size
- X-Large
- Wheel Size
- 29-inch
- Cassette/Rear Cogs
- SRAM Eagle XG-1275, 10-52, 12 speed
- Front Tire
- Size: XS, S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40" Size: XS, S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60" Size: XS, S Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 27.5x2.50" Size: S, M, ML, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60" Size: S, M, ML, L, XL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29x2.50"
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.