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2018 Trek

Fuel EX 8 29

A 29″ aluminum frame full suspension trail bike with high-end components.
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Manufacturer Price

$3,199
Weight31.1 lbs  
FrameAluminum
SuspensionFull, 130 / 130mm
ForkFox Rhythm Float 34
ShockFox
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetGX Eagle, Truvativ Descendant
BrakesSRAM Guide R Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Fuel EX 8 29
Other Trail bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

28 mph

Fuel EX 8 29

26 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Trek Fuel series is celebrated for its innovative frame design and versatile performance, making it a standout in the mountain-youth category. Its suspension system, particularly the Active Braking Pivot (ABP) and RE:aktiv technology, delivers a plush ride that excels both uphill and downhill. The bikes are noted for their stiff frames, efficient climbing, and confident handling, though some models could benefit from upgrades like tubeless wheelsets and dropper posts.

Pros
  • Innovative frame and suspension design

  • Efficient climbing with good traction

  • Confident and balanced handling

  • High-quality components and durable construction

  • Versatile performance across various terrains

Cons
  • Non-tubeless wheelset and tyres on some models

  • Lack of a dropper post in entry-level builds

  • Narrow bars limiting aggressive riding

  • Basic wheelset with workaday hubs

  • Some models have front suspension that can't match the rear's performance

Key Quotes
A great full-sus all-rounder with an innovative frame.
Cyclist logoCyclist
Trek's Fuel EX 7 29er contains modern bike technology with a classic ride feel
BikeRadar logoBikeRadar
No matter where and how we rode it during our year-long test the Fuel EX reaffirmed the outstanding credentials that earned it its 'best in test' badge
Enduro Mountainbike Magazine logoEnduro Mountainbike Magazine
If your long-legged enduro bike is a chainsaw, the Fuel EX rides like a surgeon’s scalpel.
Loam Wolf logoLoam Wolf
The carbon fronted Trek Fuel EX 9.7 29 is easily the stiffest bike in those we tested.
MBR logoMBR

Feedback?

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Outdoor Gear Lab
Trek Fuel EX 8

Nov 2019 · Jeremy Benson

The Fuel EX 8 is an impressively capable, versatile, and well-rounded trail bike that is ready for anything you are. Trek redesigned the Fuel EX models for...

Highs
  • Relatively affordable

  • Good component spec for the price

  • Great small bump compliance

  • Versatile/well-rounded

Lows
  • Frame sizing feels a little small

  • Can be overwhelmed in super aggressive terrain

Read Review

Mountain Bike Action
Throwback Thursday: Trek Fuel EX 9.9 29

Oct 2019 · McCoy

One seriously light and capable bike

Read Review

Pinkbike
Video: 2020 Santa Cruz Tallboy VS Trek Fuel EX - Cage Match

Sep 2019 · Pinkbike Originals

The Fuel EX and Tallboy are both brand new and impressively capable trail bikes, but which one do we prefer? Levy and Kazimer ride both and pick the winner.

Read Review

Whistler Mountain Bike
2019 Trek Top Fuel 9.8 SL 1st Ride Impression

Feb 2019 · Dale Tiessen

Let’s be clear - Trek’s Top Fuel is a XC race weapon. This is not your typical ‘Whistler XC’ bike, which the greater industry may characterize as a ‘trail’ or ‘all mountain’ bike. The Top Fuel is designed for World Cup XC race courses. It is meant to be precise, light and fast.

Read Review

Cyclist
Trek Fuel EX 5 full suspension MTB review

Oct 2018 · Joseph Delves

A great full-sus all-rounder with an innovative frame

Read Review

Loam Wolf
Review: Fuel EX 9.7 29

Jun 2018 · Nic “U-Turn” Hall

Without a doubt one of our favorite bikes in the budget bike roundup. The Trek Fuel EX 9.7 blends a refined look with affordable performance to offer you a killer mountain bike at a great value.

Read Review

MBR
Trek Fuel EX 9.7 29 (2018) review - MBR

May 2018 · Paul Burwell

You’re only looking at around 150g in weight saving over an aluminium frame, but the carbon fronted Trek Fuel EX 9.7 29 is easily the stiffest bike in those we tested.

Read Review

Enduro Mountainbike Magazine
Trek Fuel EX 8 29 XT review

May 2018 · Valentin Rühl

All Trek’s bikes have one thing in common: you'll feel right at home on them after just a few turns of the cranks. The Trek Fuel EX 8 29 is no exception. Read on to find out how it performs on the trail.

Read Review

Geometry
Specs
Build
Frame

Alpha Platinum Aluminum, ABP, Boost148, Knock Block steerer stop, Full Floater, EVO link, E2 tapered head tube, Mino Link, Control Freak internal routing, down tube guard, PF92, ISCG 05, G2 Geometry, 130mm travel

BB StandardBB86/BB92, Press Fit

Fork

Fox Rhythm 34 Float, GRIP adjustable damper, E2 tapered steerer, G2 Geometry w/51mm offset, Boost110, 130mm travel

Travel130mm

Spring TypeAir

Shock

Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm

Travel130mm

Bottom Bracket

PF92

Headset

Knock Block Integrated, sealed cartridge bearing, 1-1/8˝ top, 1.5˝ bottom

Stem

Bontrager Line, Knock Block, 35mm clamp, 0 degree, 60mm length

Handlebar

Bontrager Line, 35mm, 15mm rise, 750mm width

Saddle

Bontrager Evoke 2, chromoly rails

Seatpost

Bontrager Drop Line, internal routing, 31.6mm (15.5: 100mm / 17.5 & 18.5: 125mm / 19.5 & 21.5: 150mm)

TypeDropper

Pedals

Not included

Grips

Bontrager Race Lite, lock-on

Groupset
Rear Derailleur

SRAM GX Eagle, Roller Bearing Clutch

Crank

SRAM Descendant 6k Eagle, 32T Direct Mount X-Sync

Shifters

SRAM GX Eagle, 12 speed

Cassette

SRAM XG-1275, 10-50, 12 speed

Chain

SRAM GX Eagle

Brakes

SRAM Guide R hydraulic disc

TypeSRAM Guide R Hydraulic Disc

Wheels
Rims

Bontrager Line Comp 30, Tubeless Ready, 54T Rapid Drive, Boost110 front, Boost148 rear, tubeless strips included, valves sold separately

Tires

Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, 120tpi, aramid bead, 29x2.40˝

Rider Notes
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First added February 15

Last updated February 15

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