Trek

2021 Trek Top Fuel 9.9 XX1 AXS

Previous used estimate

$3,063 - $3,151

Actual value depends on condition, size, and local demand.

2021 Trek Top Fuel 9.9 XX1 AXS

Value Guide market data · 2021 Trek Top Fuel 9.9 XX1 AXS

12-month projected trend

6%

Direction and magnitude, not judgment

vs. category average

9%

Drops faster than category avg

Price over time - 2021 Trek Top Fuel 9.9 XX1 AXS

$10.0k$5.7k$1.3kMSRPMSRPYr 1Yr 2Yr 3Yr 4Yr 5Yr 6Yr 7Yr 7Yr 8Yr 9Yr 10Yr 11Yr 12Yr 13Yr 14Yr 14Yr 15Yr 16Yr 17Yr 18Yr 19Yr 20Yr 20

Values based on actual sales data. Enter your bike's specifics to get a precise valuation.

All Top Fuel model years

Overview

About this bike

Top Fuel 9.9 XX1 AXS pulls out all the stops. This full suspension carbon mountain bike is built with the latest in fully wireless components like a SRAM XX1 Eagle AXS drivetrain and RockShox Reverb AXS dropper. It's also spec'd with high-end RockShox suspension and lots of carbon—including the wheels, bars, and shift levers. It's right for you if... You want fun. All of it. But you’re also serious about speed, and want a bike that's spec'd accordingly. You're looking for a quick down-country shredder that's fast on flats, soaks up rough terrain, and has the latest in fully wireless electronic components. The tech you get A full carbon frame, super-plush 120mm RockShox Pike Ultimate fork with a Charger 2 RC2 damper that gives you more adjustment. 115mm of rear travel with a RockShox Deluxe Ultimate shock, and a fully wireless SRAM XX1 Eagle AXS drivetrain. Plus, wide carbon Bontrager Kovee Pro 30 wheels with a 108-tooth Rapid Drive hub for instant engagement, wireless RockShox Reverb AXS dropper, and SRAM Level Ultimate brakes with carbon levers. The final word The best of the best. You get all the fast down-country fun you can handle, with all of the latest and greatest in suspension and wireless drivetrain tech. Why you'll love it - The SRAM XX1 Eagle AXS drivetrain is smart, smooth, and completely wireless - 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 - Make it yours: it's fully customizable through Project One - Wider Kovee Pro 30 wheels provide better tire support so you can run lower pressure and get more traction

Specifications

Subtype
Cross Country
Category
Mountain
Component Fork
RockShox SID Ultimate, DebonAir spring, Charger Race Day damper, remote lockout, tapered steerer, 44mm offset, 15mm Maxle Stealth, 120mm travel
Component Size
Small, Medium, Medium/Large, Large, X-Large
Component Stem
Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree
Product Family
Top Fuel
Component Axles
Front: 110 x 15mm thru-axle Rear: 148 x 12mm thru-axle
Component Chain
SRAM XX1 Eagle, 12 speed
Component Color
Matte Raw Carbon/Voodoo Trek Black, Gloss Red/Matte Carbon Smoke, Carbon Blue Smoke/Radioactive Coral
Component Frame
OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, magnesium rocker link, Mino Link, ABP, 115mm travel
Component Brakes
SRAM G2 Ultimate hydraulic disc, carbon levers, SRAM CenterLine, 6-bolt, round-edge, 180/160mm rotors
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 Cassette
SRAM Eagle XG-1299, 10-52, 12 speed
Component Crankset
SRAM XX1 Eagle AXS, DUB, Boost (52mm chainline)
Component Shifters
SRAM Eagle AXS, wireless, 12-speed
Component Handlebar
Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width
Component Seat Post
RockShox Reverb AXS; Small: 100mm travel; Medium – Medium/Large: 150mm travel; Large – X-Large: 170mm travel
Component Chainrings
32T alloy ring
Component Front Tire
Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40''
Component Rear Shock
RockShox SID Luxe Ultimate, DebonAir spring, Ultimate RL damper, 190x45mm
Component Bottom Bracket
SRAM DUB, 92mm, PressFit
Component Rear Derailleur
SRAM XX1 Eagle AXS
Rear Shock
RockShox SID Luxe Ultimate, DebonAir spring, Ultimate RL damper, 190x45mm
Crankset
SRAM XX1 Eagle AXS, DUB, Boost (52mm chainline)
Bottom Bracket
SRAM DUB, 92mm, PressFit
Chain
SRAM XX1 Eagle, 12 speed
Saddle
Bontrager Arvada, austenite rails, 138mm width
Handlebar
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 XX1 Eagle AXS
Stem
Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree
Axles
Front: 110 x 15mm thru-axle Rear: 148 x 12mm thru-axle
Brakes
SRAM G2 Ultimate hydraulic disc, carbon levers, SRAM CenterLine, 6-bolt, round-edge, 180/160mm rotors
Cassette
SRAM Eagle XG-1299, 10-52, 12 speed
Chainrings
32T alloy ring
Fork
RockShox SID Ultimate, DebonAir spring, Charger Race Day damper, remote lockout, tapered steerer, 44mm offset, 15mm Maxle Stealth, 120mm travel
Frame
OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, magnesium rocker link, Mino Link, ABP, 115mm travel
Seat Post
RockShox Reverb AXS; Small: 100mm travel; Medium – Medium/Large: 150mm travel; Large – X-Large: 170mm travel
Shifters
SRAM Eagle AXS, wireless, 12-speed
Color
Carbon Blue Smoke/Radioactive Coral
Size
X-Large
Front Tire
Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40''

What to check when buying used

Inspection

Frame condition

Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.

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.

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