2020 Trek

Fuel EX 9.9 X01 AXS

A 27.5″ / 29″ carbon frame full suspension trail bike with ultra high-end components.
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MSRP$8,499
Weight28.6 lbs  
FrameCarbon
SuspensionFull, 130 / 140mm
ForkFox Factory Float 36
ShockFox
Wheels27.5″ / 29″ Carbon
Drivetrain1 × 12 Electronic
GroupsetX01 Eagle AXS
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Fuel EX 9.9 X01 AXS
Other Trail bikes
Reviews
Gran Fondo Magazine
Trek Fuel EX 9.9 XTR Project One in bikepacking review

Oct 2020 · Benjamin Topf

The Trek Fuel EX 9.9 is an absolute classic in the trail bike segment. Could it also be the perfect bike for the next bikepacking adventure with its modern geometry and spare parts compartment in the down tube? We put the Fuel EX to the test.

Highs
  • Maximum fun on the descents

  • Intuitive and good-natured handling

  • Storage compartment in the down tube for tools or snacks

Lows
  • Too sluggish on easy terrain

  • Too much bike for long straights

  • Chain slap

Read Review

Freehub
Bike Review | 2020 Trek Fuel EX 9.9

Jun 2020 · Spencer Johnson

As warmer temperatures hit the Pacific Northwest and the dirt starts to dry, I’m always eager to get out on some long rides with some big climbs. Naturally, when this Trek Fuel EX 9.9 showed up at the Freehub office, I knew it was time to put the nimble beast through its paces. I challenged myself to a 60-mile sufferfest on some of Bellingham, Washington’s toughest climbs and descents. It definitely didn’t let me down. Climbing on this bike was a joy. Trek equipped the 9.9 model with its proprietary RE:aktiv shock with a three-position damper, which I left wide open for the entire ride. The rear suspension had an overwhelmingly supportive feel while pedaling out of the saddle, yet as soon as I hit a bump it dived deeper into the travel, keeping the rear wheel firmly planted and providing excellent traction. The geometry is modern and balanced, with a long reach and a sensible 76-degree seat angle. On the descents, the bike inspired confidence, thanks to its long wheelbase and bottomless-feeling suspension. My confidence was further enhanced by the reliable stopping power of the Shimano XT brakes. As a 200-pound rider, I couldn’t have appreciated the ultra-powerful XT brakes and the 203-millimeter front rotor more—especially while bombing down some of Bellingham’s scariest double-black trails.

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BikeRadar
Trek Fuel EX 9.7 review

Apr 2020 · Tom Marvin

A classic trail bike, with a fun and engaging ride built around a solid frame

Highs
  • A solid feeling frame backed up by a ride quality that encourages you to pop and play around

Lows
  • The long Shimano brake levers kill the feel, while the supple rear suspension shows up the budget fork

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Enduro Mountainbike Magazine
Trek Fuel EX 9.9 X01 AXS Project One on test – one bike, endless possibilities!

Feb 2020 · Christoph Bayer

The Trek Fuel EX 9.9 is a classic in the trail bike segment. Last year, Trek completely redesigned the bike, putting a storage compartment in the down tube, updating the geometry and revising the suspension. We’ll tell you whether the new Fuel EX can build on the success of its predecessor. Click here for an […]

Highs
  • Light-footed and efficient climber

  • Intuitive, good-natured and fun handling

  • Storage compartment in the down tube for tools or food

Lows
  • Not the most sensitive rear end

  • Tires lack grip

  • Chain slap

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Outdoor Gear Lab
Trek Fuel EX 5

Jan 2020 · Jeremy Benson

Trek recently redesigned their popular Fuel EX mid-travel trail bikes for the 2020 model year. The updated geometry brings this bike in line with modern...

Highs
  • Supple rear suspension

  • Versatile

  • Fun on a wide range of terrain

  • Affordable

Lows
  • Moderately heavy

  • Short dropper post

  • Frame sizing runs a little small

Read Review

MBR
Trek Fuel EX 9.8 review - MBR

Nov 2019 · Alan Muldoon

The updated Trek Fuel EX now features storage in the downtube, 29er wheels, more travel and a gorgeous frame… oh and it’s rollicking fast too.

Highs
  • Punchy trail bike with great handling.

Lows
  • Low profile tyre tread lacks bite.

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Mountain Bike Action
Throwback Thursday: Trek Fuel EX 9.9 29

Oct 2019 · McCoy

One seriously light and capable bike

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BIKE Magazine
First Ride: 2020 Trek Fuel EX 9.9

Aug 2019

This is not what it looks like. Even though this new Fuel EX has a Fox 36, it doesn’t mean it has shed its trail-bike past for an enduro-bike future. Even

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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
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, Boost148, 130mm travel

BB StandardBB86/BB92, Press Fit

Tire Clearance2.6"

Fork

Fox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm bolt-on axle, 140mm travel

Travel140mm

Spring TypeAir

Shock

Size: XS, S, Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x52.5mm; Size: S, ML, L, M, XL, Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x55mm

Travel130mm

Spring TypeAir

Bottom Bracket

SRAM DUB, 92mm, PressFit

Headset

Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom

Stem

Size: XS, S, Bontrager Line Pro, 35mm, Knock Block, 0 degree, 40mm length; Size: ML, L, M, XL, Bontrager Line Pro, 35mm, Knock Block, 0 degree, 50mm length

Handlebar

Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width

Saddle

Bontrager Arvada, austenite rails, 138mm width

Seatpost

Size: XS, S, RockShox Reverb AXS, 100mm travel, wireless, 31.6mm, 340mm length; Size: ML, M, RockShox Reverb AXS, 150mm travel, wireless, 31.6mm, 440mm length; Size: L, XL, RockShox Reverb AXS, 170mm travel, wireless, 31.6mm, 480mm length

TypeDropper

Grips

Bontrager XR Trail Elite, alloy lock-on

Groupset
Rear Derailleur

SRAM X01 Eagle AXS

Crank

Size: XS, S, SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 170mm length; Size: ML, L, M, XL, SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 175mm length

Shifters

SRAM Eagle AXS, wireless, 12-speed

Chain

SRAM XX1 Eagle, 12 speed

Brakes

Shimano XT M8120 4-piston hydraulic disc

TypeHydraulic Disc

Wheels
Rims

Front: Bontrager Line Carbon 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, Rear: Bontrager Line Carbon 30, Tubeless Ready, 54T Rapid Drive, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle

Tires

Size: XS, S, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60''; Size: S, ML, L, M, XL, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60''

Disc Rotors

Size: XS, S, ML, L, M, XL, Shimano RT76, 180mm, 6-bolt; Size: XS, S, ML, L, M, XL, Shimano RT76, 203mm, 6-bolt

Rider Notes
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Last updated July 7
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