Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Top Fuel 8 NX
Previous used estimate
$1,380 - $1,420
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Trek Top Fuel 8 NX
12-month projected trend
12%
Direction and magnitude, not judgment
vs. category average
1%
Drops faster than category avg
Price over time - 2021 Trek Top Fuel 8 NX
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Top model years
2025$6,230 - $6,410▲ 351% vs. 2021
2024$2,116 - $2,177▲ 53% vs. 2021
2023$3,655 - $3,760▲ 165% vs. 20212021$1,380 - $1,420Currently viewing
2020$3,381 - $3,479▲ 145% vs. 2021
2019$2,256 - $2,321▲ 63% vs. 2021
2018$2,235 - $2,299▲ 62% vs. 20212017$2,046 - $2,105▲ 48% vs. 2021
2016$1,992 - $2,050▲ 44% vs. 2021
2012$1,561 - $1,606▲ 13% vs. 2021
2011$1,437 - $1,478▲ 4% vs. 2021
2010$1,313 - $1,351▼ 5% vs. 2021
2009$1,153 - $1,186▼ 16% vs. 2021
2008$1,153 - $1,186▼ 16% vs. 2021
2007$1,249 - $1,285▼ 9% vs. 2021Overview
About this bike
Top Fuel 8 fuses the lightweight efficiency of a cross country bike with the capability and forgiveness of a full suspension trail bike. It's quick, nimble, and dishes out serious fun on flow trails and techy descents alike. It's right for you if... You’re looking for a do-it-all full suspension mountain bike that balances efficiency with shred-ability. You want to rip rough descents, fly up climbs, and even do a couple XC races. The tech you get A lightweight aluminum frame, 120mm RockShox Recon Gold RL fork with plush DebonAir spring, 115mm of rear travel with a FOX Performance Float shock, and a lighter SRAM NX Eagle drivetrain. Plus, hydraulic disc brakes, Bontrager DropLock dual remote suspension lockout, and a Bontrager Line Dropper. The final word Top Fuel 8 gets you the value of an alloy frame with drivetrain, fork, and brake upgrades that keep up as you progress in speed and skill. Why you'll love it - This short-travel bike has a killer suspension setup reminiscent of the all-mighty mullet—it's both efficient and ready to party - Bontrager DropLock's shifter-style lever lets you easily lock out both front and rear shocks at the same time for added sprinting or climbing - efficiently. Plus, it controls your dropper post too - Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride - You get a Straight Shot downtube for extra-stiff, responsive handling without added weight, and a Knock Block headset that protects against spinning bars and fork crowns
Specifications
- Subtype
- Cross Country
- Category
- Mountain
- Component Fork
- RockShox Recon Gold RL, Solo Air spring, Motion Control damper, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 120mm travel
- Component Hubs
- Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt Rear: 6-bolt, Shimano 10 freehub
- Component Size
- Small, Medium, Medium/Large, Large, X-Large, XX-Large
- Component Stem
- Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree, 60/70mm length
- Product Family
- Top
- Component Axles
- Front: Boost 110 x 15mm thru-axle Rear: Boost 148 x 12mm thru-axle
- Component Chain
- SRAM NX Eagle, 12 speed
- Component Color
- Volt/Dark Aquatic, Satin Trek Black
- Component Frame
- Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel
- Component Brakes
- Front: SRAM CenterLine, 6-bolt, round-edge, 160mm Rear: SRAM CenterLine, 6-bolt, round-edge, 180mm
- Component Saddle
- Bontrager Arvada, steel rails, 138mm width
- Component Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Component Cassette
- SRAM PG-1230 Eagle, 11-50, 12 speed
- Component Crankset
- SRAM NX Eagle, DUB Boost (52mm chainline), 170/175mm length
- Component Shifters
- SRAM NX Eagle, 12 speed
- Component Handlebar
- Bontrager Comp, alloy, 31.8mm, 15mm rise, 750mm width
- Component Seat Post
- Bontrager Line Dropper, 100/150mm travel, internal routing, 31.6mm, 345/440mm length
- Component Chainrings
- 32T steel ring
- Component Front Tire
- Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40'', Bontrager TLR valve, 50mm
- Component Rear Shock
- Fox Performance Float, 2-position DPS damper, Bontrager DropLock remote, 190x45mm
- Component Bottom Bracket
- SRAM DUB, 92mm, PressFit
- Component Rear Derailleur
- SRAM NX Eagle
- Rear Shock
- Fox Performance Float, 2-position DPS damper, Bontrager DropLock remote, 190x45mm
- Hubs
- Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt Rear: 6-bolt, Shimano 10 freehub
- Crankset
- SRAM NX Eagle, DUB Boost (52mm chainline), 170/175mm length
- Bottom Bracket
- SRAM DUB, 92mm, PressFit
- Chain
- SRAM NX Eagle, 12 speed
- Saddle
- Bontrager Arvada, steel rails, 138mm width
- Handlebar
- Bontrager Comp, alloy, 31.8mm, 15mm rise, 750mm width
- Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Rear Derailleur
- SRAM NX Eagle
- Stem
- Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree, 60/70mm length
- Axles
- Front: Boost 110 x 15mm thru-axle Rear: Boost 148 x 12mm thru-axle
- Brakes
- Front: SRAM CenterLine, 6-bolt, round-edge, 160mm Rear: SRAM CenterLine, 6-bolt, round-edge, 180mm
- Cassette
- SRAM PG-1230 Eagle, 11-50, 12 speed
- Chainrings
- 32T steel ring
- Fork
- RockShox Recon Gold RL, Solo Air spring, Motion Control damper, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 120mm travel
- Frame
- Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel
- Seat Post
- Bontrager Line Dropper, 100/150mm travel, internal routing, 31.6mm, 345/440mm length
- Shifters
- SRAM NX Eagle, 12 speed
- Color
- Satin Trek Black
- Size
- XX-Large
- Front Tire
- Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40'', Bontrager TLR valve, 50mm
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.