Fuel EX 9.8 GX AXS Gen 6

Overview

"This is a bike that could be used to head out for a big meandering backcountry adventure one day, roll up to the starting line in a local enduro race the next, or even head into the bike park for a lap or three without missing a beat."

"The burliest, most versatile, and most capable Fuel yet; truly up for whatever you want to ride [...] The updated geometry sits comfortably amongst today's best trail bikes [...] Absolutely shreds right out of the box."

"Fuel EX proved itself a happy climber. From slabs to roots and square-edge hits, the Fuel EX handled it masterfully. A damn fine trail bike right out of the box, no matter your riding style."

"Fuel EX absolutely devours chunky terrain while still retaining the ability to tractor up steep climbs. I have become convinced that a bike with long, stable geometry and mid-level travel really can provide the best of both worlds."

"The term ‘quiver killer’ may be old and tired, but there’s nothing old-fashioned about a versatile mountain bike that can handle nearly any terrain [...] Riding the Fuel EX this summer was a treat!"

"Fuel EX is a highly adaptable bike that feels comfortable in a really wide variety of terrain but doesn’t confuse itself for anything more or less. Bike riders, rejoice."

"Fuel EX's geometry feels ready for just about anything. There's plenty of traction for climbing and a nice fluttery feel on descents, calmly smothing out the trail chatter."

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Choose from the lighter 130/140mm Fuel EX Gen 5 with better parts for the price or the more robust 140/150mm Fuel EX Gen 6 with more adjustability.

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Whether you're busting berms, ripping rock gardens, or surfing singletrack — here are the accessories and gear you need to make sure your Fuel EX is always ready to send.

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Time to bust out the repair stand for some maintenance? Find a detailed breakdown of your bike with part numbers, torque values, and platform-specific tech instructions below.

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Watch Jason from Mahalo My Dude take a Fuel EX from frameset to sweet new build.

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Follow along as Casey Brown and Kirsten Van Horne let 'er rip from Golden to Kamloops on the new Fuel EX.

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Take a closer look at Brandon Semenuk and Kade Edwards' inverted rides.

When it comes to being a better trail rider, practice makes perfect. Get seven tips from Pinkbike’s Christina Chappetta that will have you setting PR's and riding with more confidence in no time.

Features

Internal frame storage makes it easy to ditch the pack and still carry your ride essentials.

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Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

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Install angle adjust headset cups (sold separately) to tweak the 64.5-degree head tube angle a degree steeper or slacker to your liking — all without impacting your bottom bracket height.

How it works

Adjust leverage rate with just a flip of a chip. Ride it in the Less progressive setting for a plusher feel perfect for rugged trails with square-edge bumps. Flip it to More progressive when you're hitting big features and don’t want to bottom-out, or when you want to run a coil shock.

Size-specific chainstays provide balanced handling to keep the ride nimble for smaller riders and improve front wheel traction on climbs for taller riders.

Craving the nimble ride of 27.5˝ wheels but don’t want to sacrifice the speed of a 29er? No need to choose. Fuel EX is mullet-ready, just throw Mino Link in high, toss on a 160mm fork, and get ready to party.

Deck out your Fuel EX Gen 6 with our favorite compatible accessories

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This bike doesn’t come with pedals because you'll have a better ride if you choose your own. Explore the pedal guide to find the best pedals for your riding style. Reach for flat pedals for simple versatility or go for clipless MTB pedals if you want control & efficiency.

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This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.

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Forward-thinking frame design opens possibilities for riders who want full customization. A bigger seat tube lets you roll with a beefier, longer dropper post, and broader shock compatibility plays well with tons of aftermarket shocks, including coil.

Make your head tube angle slacker or steeper by one degree with angle-adjust cups.

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Enjoy precise, lightning fast gear changes—even when shifting under load—with Eagle AXS wireless electronic drivetrains. They're water- and dust-proof, and the AXS App makes it easy to personalize your settings.

Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.

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Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.

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More robust than pressfit, threaded BBs hold up in nasty conditions and make servicing easier.

With 108 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.

Two-piece dual-density bolt-on down tube guard protects from rock strikes and shuttle damage — all the while quieting the ride with a beefy chainstay guard.

International Standard Chain Guide mounts offer easy chain guide installation and adjustment.

Bigger is better. The oversized seat tube diameter gives more support and strength for longer travel droppers, and allows for more robust, durable internals that work faster.

Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.

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Specs

Frame	OCLV Mountain Carbon, internal storage, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, guided internal routing, magnesium rocker link, 34.9mm seat tube, ISCG 05, 55mm chainline, BSA 73, downtube guard, shuttle guard, ABP, UDH, Boost148, 140mm travel
Fork	Fox Performance 36, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 150mm travel
Shock	Fox Performance Float X, 2-position damper, 185mm x 55mm
Max compatible fork travel	160mm

*Wheel front	Size: XS , S Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5''
Size: S , M , ML , L , XL Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
*Wheel rear	Size: XS , S Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 27.5''
Size: S , M , ML , L , XL Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 29''
Hub front	Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Skewer rear	Bontrager Switch thru axle, removable lever
Rim	Bontrager Line Elite 30, Tubeless Ready
*Tire	Size: XS , S Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 27.5x2.50''
Size: S , M , ML , L , XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50''
Tire part	Bontrager TLR sealant, 6oz
Rim strip	Bontrager TLR
Max tire size	Frame: 29x2.50" (XS & S: 27.5x2.50"), Fork: See manufacturer

Battery	SRAM eTap battery pack (with charger)

Shifter	SRAM GX Eagle AXS, 12 speed
Rear derailleur	SRAM GX Eagle AXS
Crank	SRAM GX Eagle, DUB MTB Wide, 30T, 55mm chainline, 170 length
Bottom bracket	SRAM DUB MTB Wide, 73mm, BSA threaded
Cassette	SRAM Eagle XG-1275, 10-52, 12 speed
Chain	SRAM GX Eagle, 12 speed
Max chainring size	1x: 34T round, 32T oval, min 28T

Saddle	Bontrager Arvada, austenite rails, 138mm width
*Seatpost	Size: XS , S Bontrager Line Elite Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 345mm length
Size: M , ML Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length
Size: L Bontrager Line Elite Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 485mm length
Size: XL Bontrager Line Elite Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 550mm length
*Handlebar/stem (integrated)	Size: XS , S Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm stem length
Size: M , ML , L , XL Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 45mm stem length
Grips	Bontrager XR Trail Elite, nylon lock-on
Headset	Integrated cartridge bearing, 1-1/8'' top, 1.5'' bottom, angle adjust cup compatible
Brake	SRAM Code R 4-piston hydraulic disc
*Brake rotor	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
Rotor size	Max brake rotor sizes - Frame: 203mm, Fork: see fork manufacturer

Bag	Bontrager BITS Internal Frame Storage Bag

Weight	M - 14.15 kg / 31.21 lbs (with TLR sealant, no tubes)
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

Sizing

How tall are you?

To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inseam?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inseam measurement. Your inseam is very important to your final bike size so please measure carefully.

Geometry

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Pinkbike's 2022 Mountain Bike of the Year

Editor's Choice: Best Mid-Travel Trail Bike

"Our favorite Trek"

"Fuel EX is a masterpiece"

Editor's Choice

"Loves to ride fast, both up and down"

"Ready for anything"

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Which generation is right for you?

FAQ's

Fuel EX-compatible accessories

Service manual

It's new bike day!

Golden Heaven: Nothing but good vibes

BIKE CHECK: The Fuel EX's of ‘Parallel II’

Get faster on the trail in a week

Product features

Internal Storage

Active Braking Pivot

Slack or steep, the choice is yours

Adjust the sus for full send

Size-specific stays

Business in the front, party in the back

Trail-ready gear

You almost forgot your pedals

Suspension Calculator

New frame, new possibilities

Need an adjustment?

SRAM Eagle AXS drivetrain

Complete Tubeless System

Carbon Care Wheel Loyalty Program

Threaded bottom bracket

Rapid Drive 108 rear hub

On guard

ISCG mounts

Oversized 34.9mm dropper post

Mino Link adjustable geometry

How tall are you?

What is your inseam?