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 AXS Gen 5
Previous used estimate
$1,983 - $2,040
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Trek Fuel EX 9.8 GX AXS Gen 5
12-month projected trend
11%
Direction and magnitude, not judgment
vs. category average
3%
Drops faster than category avg
Price over time - 2021 Trek Fuel EX 9.8 GX AXS 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 130mm rear and 140mm front FOX suspension with upgraded front and rear dampers, carbon wheels with a Rapid Drive rear hub, and SRAM's latest, widest-range wireless electronic drivetrain give this model an extra edge you'll notice from the first pedal stroke.
Specifications
- Subtype
- Trail / Enduro
- Category
- Mountain
- Component Bag
- Bontrager Bits Bag For Storage Door, Black
- Component Fork
- Fox Suspension Fork Float 36 Performance 27.5 140mm Grip Damper EVOL 1.5'' Tapered Alloy Steer 110x15mm Magnesium Lowers with 180mm Direct Mount Brake Tabs and Kabolt Thru Axle
- Component Pump
- Bontrager Suspension Shock Pump Black
- Component Stay
- Trek Chainstay Fuel EX 2021 Carbon, 148x12 OLD, 29x2.6'' Max Tire Size, Paint Match Gloss Rage Red; Trek Seatstay Fuel EX 2021 Carbon, 148x12 OLD, 29x2.6'' Max Tire Size, Paint Match Gloss Rage Red and Gloss Raw Carbon
- Component Stem
- Bontrager Stem Line Pro, 35mm Length, 0° Rise, 35.0mm Bar Clamp Black
- Component Tire
- Bontrager Tire XR4 Team Issue 27.5x2.40 TLR; Bontrager Tire XR4 Team Issue TLR, 27.5x2.60
- Product Family
- Fuel
- Component Armor
- Trek Armor Fuel EX 2021 Carbon Chainstay Black; Trek Armor Knock Block Downtube Fork Guard, Adhesive, 2017 Black
- Component Brake
- SRAM Hydraulic Brake G2 RS 950mm Hose Length; SRAM Hydraulic Brake G2 RS 1700mm Hose Length
- Component Chain
- SRAM Chain GX Eagle 12 speed 114 Links with Powerlink, SRAM Part Number 00.2518.030.006
- Component Color
- Greydark_Reddark; Grey_Orange; Greendark_Black; Greydark
- Component Cover
- Trek Storage Door MTB Matte Black, Without Water Bottle Cage
- Component Crank
- SRAM Crank Truvativ GX 7K 170mm DUB 30 Tooth
- Component Decal
- Stick-On Trek Shield Headtube Badge, Black
- Component Grips
- Bontrager Grips XR Trail Elite, 130mm, Black
- Component Shock
- Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm
- Component Valve
- Bontrager TLR Valve, 50mm, Black
- Component Saddle
- Bontrager Saddle Arvada Austenite Rails Medium Black
- Component Spacer
- Trek Main Pivot Bearing Spacer; Trek Main Pivot Frame Spacer, 22mm OD x 17mm ID x 3mm Thick; Trek Main Pivot Bearing Spacer, 20mm OD x 17mm ID x 40mm Length; Suspension Part, Washer, 16mm OD / 10mm ID / 3mm Thickness; Full Speed Ahead Knock Block Headset Spacers 10mm, Trek Proprietary Steer Stop System, 10mm x 28.6mm Steer, Must Be Paired With Trek Knock Block Headset and Bontrager Knock Block Stems
- Component Bearing
- Trek Sealed Cartridge Shock Pivot Bearing 6800, 10mm ID, x 19mm OD, x 5mm Thick, Reference Service Manual for quantity and installation information; Trek Sealed Cartridge Main Pivot Bearing 3803 2RS Double Lipped, 17mm ID, x 26mm OD, x 10mm Thick, Reference Service Manual for quantity and installation information; FSA Headset Bearing, MR122, 1-1/8in; FSA Headset Bearing, MR127, 1.5in; Trek Rocker Pivot Bearing, Double Row, 12mm ID x 21mm OD x 8mm Thick, Trek Rear Suspension Fastener M10x1x20mm Reference Service Manual for quantity and installation information
- Component Headset
- Trek Headset Knock Block 58-degree turning radius with Display Tabs on Frame Chip
- Component Shifter
- SRAM GX Eagle AXS Rear Shifter, 12 speed, 2-button, SRAM Part Number 00.3018.297.001
- Component Cassette
- SRAM Cassette XG1275 12-speed, 10-52, Black, SRAM Part Number 00.2418.103.000
- Component Fastener
- Trek Fastener M3x0.5x12mm Flat Head Countersunk Screw For Fastening non-Control Freak Cable Management; Trek Fastener M4x0.7x16mm Flat Head Countersunk 3mm Hex Driver For Use with Knock Block Frame Chip and Control Freak Cable Management, quantities needed vary by bike model; Trek Main Pivot Nut, D-Shaped, M17; Trek Rocker Pivot Axle Bolt, M12x1.25x81mm; Trek Seatstay Pivot Bolt, M10x1x21mm; Trek Thru Shaft Shock Bolt, M10x1x16mm; Trek Powerfly FS 2021 Main Pivot Hardware Kit; Trek M4x0.7x10mm Button Head Bolt, 2.5mm Hex Head, Corrosion Resistant, for use securing Trek Session armor to frame exterior, used with a flat washer
- Component Seatpost
- Bontrager Line Elite Dropper Seatpost, 340mm Length, 100mm Travel, 31.6mm Diameter
- Component Brake Pad
- Brake Pad for SRAM G2 RSC, G2 Ultimate, Guide R, Guide RS, Guide RSC, Guide T, Guide Ultimate : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Component Handlebar
- Bontrager Handlebar Line Pro 35.0mm Clamp 780mm Width 27mm Rise Carbon
- Component Mainframe
- 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, Boost148, 130mm travel
- Component Rim Strip
- Bontrager Enduro 27.5/650 TLR Rim Stripe, 33mm, Symmetric Profile
- Component Tire Part
- Bontrager TLR Tire Sealant 6 oz. Bottle
- Component Rear Wheel
- NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle
- Component Brake Rotor
- SRAM Disc Brake Rotor, Centerline, 6-Bolt, 180mm, SRAM Part Number 00.5018.111.002
- Component Front Wheel
- NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
- Component Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Component Seat Collar
- Bontrager Seatpost Clamp, 36.4mm Bolt-On, Black
- Component Bar End Plug
- Bontrager Bar End Plug
- Component Hardware Kit
- C WR; C WR
- Component Headset Part
- FSA Compression Ring, FSA p/n H2048; FSA 1.5'' Crown Race, FSA p/n H6083; Bontrager Headset Topcap, w/ Star Nut, Matte Black
- Component Seatpost Part
- Bontrager Line Elite Dropper Seatpost 1x Lever, Left-hand Under bar mounted. Mounted to Matchmaker X or I-Spec mounts OE, replacement lever includes band clamp mount. Black
- Component Bike Part Misc
- 11.5015.048.140 MMx Clamp Blk Left Steel Blk Bolt; 11.5015.048.240 MMx Clamp Blk Right Steel Blk Bolt
- Component Bottom Bracket
- SRAM Bottom Bracket DUB Pressfit 92 MTB
- Component Touch Up Paint
- Paint Color: Gloss Rage Red, TK407-M; Paint Color: Gloss Unpainted, 1083
- Component Rear Derailleur
- SRAM GX Eagle AXS Rear Derailleur, 12 speed, SRAM Part Number 00.7518.142.000
- Component Suspension Link
- Trek Rocker Link Fuel EX 29 2020 Magnesium, 54mm x 10mm Upper Eyelet Spacing, Paint Match Gloss Black
- Component Cable Management
- ''Control Freak'' Plug - Replacement Piece for W513980 & W519232; Trek Control Freak Triple Cable Management Guide, Two 5mm Guides + Optional 4mm Guide; Trek Cable Management Control Freak Combination Plug/Guide - Option to Fully Plug, offer 2x Full Housing, or 2x Full Housing and Di2 Wiring; Trek Cable Management MTB BB Cable Exit Guide First Used on MY20 Fuel EX Carbon
- Component Cable Housing Set
- Bontrager Shift Housing 4mm Diameter, Black
- Component Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
- Component Cable Housing Part
- Trek Cable Management Housing Entrance Guide for Hydraulic Hose and Full Length Shift Housing Black
- Bottom Bracket
- SRAM Bottom Bracket DUB Pressfit 92 MTB
- Chain
- SRAM Chain GX Eagle 12 speed 114 Links with Powerlink, SRAM Part Number 00.2518.030.006
- Seatpost
- Bontrager Line Elite Dropper Seatpost, 340mm Length, 100mm Travel, 31.6mm Diameter
- Saddle
- Bontrager Saddle Arvada Austenite Rails Medium Black
- Handlebar
- Bontrager Handlebar Line Pro 35.0mm Clamp 780mm Width 27mm Rise Carbon
- Headset
- Trek Headset Knock Block 58-degree turning radius with Display Tabs on Frame Chip
- Rear Derailleur
- SRAM GX Eagle AXS Rear Derailleur, 12 speed, SRAM Part Number 00.7518.142.000
- Stem
- Bontrager Stem Line Pro, 35mm Length, 0° Rise, 35.0mm Bar Clamp Black
- Cassette
- SRAM Cassette XG1275 12-speed, 10-52, Black, SRAM Part Number 00.2418.103.000
- Fork
- Fox Suspension Fork Float 36 Performance 27.5 140mm Grip Damper EVOL 1.5'' Tapered Alloy Steer 110x15mm Magnesium Lowers with 180mm Direct Mount Brake Tabs and Kabolt Thru Axle
- Shifter
- SRAM GX Eagle AXS Rear Shifter, 12 speed, 2-button, SRAM Part Number 00.3018.297.001
- Color
- Greydark_Reddark; Grey_Orange; Greendark_Black; Greydark
- Rear Wheel
- NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle
- Front Wheel
- NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
- Brake
- SRAM Hydraulic Brake G2 RS 950mm Hose Length; SRAM Hydraulic Brake G2 RS 1700mm Hose Length
- Cable Housing Set
- Bontrager Shift Housing 4mm Diameter, Black
- Crank
- SRAM Crank Truvativ GX 7K 170mm DUB 30 Tooth
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Grips
- Bontrager Grips XR Trail Elite, 130mm, Black
- Rim Strip
- Bontrager Enduro 27.5/650 TLR Rim Stripe, 33mm, Symmetric Profile
- Seat Collar
- Bontrager Seatpost Clamp, 36.4mm Bolt-On, Black
- Tire
- Bontrager Tire XR4 Team Issue 27.5x2.40 TLR; Bontrager Tire XR4 Team Issue TLR, 27.5x2.60
- Touch-Up Paint
- Paint Color: Gloss Rage Red, TK407-M; Paint Color: Gloss Unpainted, 1083
- Armor
- Trek Armor Fuel EX 2021 Carbon Chainstay Black; Trek Armor Knock Block Downtube Fork Guard, Adhesive, 2017 Black
- Bag
- Bontrager Bits Bag For Storage Door, Black
- Bar End Plug
- Bontrager Bar End Plug
- Bearing
- Trek Sealed Cartridge Shock Pivot Bearing 6800, 10mm ID, x 19mm OD, x 5mm Thick, Reference Service Manual for quantity and installation information; Trek Sealed Cartridge Main Pivot Bearing 3803 2RS Double Lipped, 17mm ID, x 26mm OD, x 10mm Thick, Reference Service Manual for quantity and installation information; FSA Headset Bearing, MR122, 1-1/8in; FSA Headset Bearing, MR127, 1.5in; Trek Rocker Pivot Bearing, Double Row, 12mm ID x 21mm OD x 8mm Thick, Trek Rear Suspension Fastener M10x1x20mm Reference Service Manual for quantity and installation information
- Brake Rotor
- SRAM Disc Brake Rotor, Centerline, 6-Bolt, 180mm, SRAM Part Number 00.5018.111.002
- Cable Management
- ''Control Freak'' Plug - Replacement Piece for W513980 & W519232; Trek Control Freak Triple Cable Management Guide, Two 5mm Guides + Optional 4mm Guide; Trek Cable Management Control Freak Combination Plug/Guide - Option to Fully Plug, offer 2x Full Housing, or 2x Full Housing and Di2 Wiring; Trek Cable Management MTB BB Cable Exit Guide First Used on MY20 Fuel EX Carbon
- Cover
- Trek Storage Door MTB Matte Black, Without Water Bottle Cage
- Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
- Fastener
- Trek Fastener M3x0.5x12mm Flat Head Countersunk Screw For Fastening non-Control Freak Cable Management; Trek Fastener M4x0.7x16mm Flat Head Countersunk 3mm Hex Driver For Use with Knock Block Frame Chip and Control Freak Cable Management, quantities needed vary by bike model; Trek Main Pivot Nut, D-Shaped, M17; Trek Rocker Pivot Axle Bolt, M12x1.25x81mm; Trek Seatstay Pivot Bolt, M10x1x21mm; Trek Thru Shaft Shock Bolt, M10x1x16mm; Trek Powerfly FS 2021 Main Pivot Hardware Kit; Trek M4x0.7x10mm Button Head Bolt, 2.5mm Hex Head, Corrosion Resistant, for use securing Trek Session armor to frame exterior, used with a flat washer
- Headset Part
- FSA Compression Ring, FSA p/n H2048; FSA 1.5'' Crown Race, FSA p/n H6083; Bontrager Headset Topcap, w/ Star Nut, Matte Black
- Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Spacer
- Trek Main Pivot Bearing Spacer; Trek Main Pivot Frame Spacer, 22mm OD x 17mm ID x 3mm Thick; Trek Main Pivot Bearing Spacer, 20mm OD x 17mm ID x 40mm Length; Suspension Part, Washer, 16mm OD / 10mm ID / 3mm Thickness; Full Speed Ahead Knock Block Headset Spacers 10mm, Trek Proprietary Steer Stop System, 10mm x 28.6mm Steer, Must Be Paired With Trek Knock Block Headset and Bontrager Knock Block Stems
- Tire Part
- Bontrager TLR Tire Sealant 6 oz. Bottle
- Valve
- Bontrager TLR Valve, 50mm, Black
- Seatpost Part
- Bontrager Line Elite Dropper Seatpost 1x Lever, Left-hand Under bar mounted. Mounted to Matchmaker X or I-Spec mounts OE, replacement lever includes band clamp mount. Black
- Brake Pad
- Brake Pad for SRAM G2 RSC, G2 Ultimate, Guide R, Guide RS, Guide RSC, Guide T, Guide Ultimate : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Cable Housing Part
- Trek Cable Management Housing Entrance Guide for Hydraulic Hose and Full Length Shift Housing Black
- Mainframe
- 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, Boost148, 130mm travel
- Shock
- Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm
- Stay
- Trek Chainstay Fuel EX 2021 Carbon, 148x12 OLD, 29x2.6'' Max Tire Size, Paint Match Gloss Rage Red; Trek Seatstay Fuel EX 2021 Carbon, 148x12 OLD, 29x2.6'' Max Tire Size, Paint Match Gloss Rage Red and Gloss Raw Carbon
- Suspension Link
- Trek Rocker Link Fuel EX 29 2020 Magnesium, 54mm x 10mm Upper Eyelet Spacing, Paint Match Gloss Black
- Hardware Kit
- C WR; C WR
- Pump
- Bontrager Suspension Shock Pump Black
- Bike Part Misc
- 11.5015.048.140 MMx Clamp Blk Left Steel Blk Bolt; 11.5015.048.240 MMx Clamp Blk Right Steel Blk Bolt
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.