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2015 Trek

Fuel EX 9.9 27.5

A 27.5″ carbon frame full suspension trail bike with ultra high-end components.
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FrameCarbon
SuspensionFull, 120 / 120mm
Wheels27.5″ Aluminum
Drivetrain1 × 11
GroupsetXTR
BrakesShimano XTR Hydraulic Disc
SeatpostDropper
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Insights
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)

24 mph

Fuel EX 9.9 27.5

26 mph

Similar Bikes

Highest gear

(descending)

Sizing
15.5"

5'0" – 5'7"

17.5"

5'5" – 5'11"

18.5"

5'9" – 6'3"

19.5"

5'9" – 6'3"

21.5"

6'1" – 6'6"

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Trek Fuel is a versatile trail bike praised for its lightweight design and efficient climbing capabilities. It offers a stable and confident ride on descents, with a suspension system that balances firmness and suppleness. Overall, it combines trail and cross-country qualities effectively, making it a fun and reliable choice for various riders.

Pros
  • Lightweight

  • Efficient climbing

  • Stable and confident on descents

  • Supple and smooth suspension

  • Versatile for trail and cross-country riding

Cons
  • Limited travel may not suit all riders

  • Some quality-control issues with components

  • May require tubeless conversion for optimal performance

Key Quotes
The Trek Fuel EX 9.8 29 is a lightweight but trail-capable 29er and a little bit XC, a little bit rock-and-roll
Bicycling
The Debonair high-volume air can transforms the ride.
BIKE Magazine logoBIKE Magazine
A real testament to how well this type of bike caters to just about any type of mountain biker
Flow Mountain Bike logoFlow Mountain Bike
This is a badass mountain bike that would make anyone happy to hit the trails.
Enduro Mountainbike Magazine logoEnduro Mountainbike Magazine

Feedback?

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Bikerumor
One Ride Review: Trek Fuel EX full suspension trail mountain bike

Nov 2016 · Tyler Benedict

Earlier this year, the Fuel EX received rapid fire updates that first introduced a 27.5+ version then quickly made it the standard model by adding 29er wheels and tires for most of the stock builds. The frame was all new for both, bumping travel to 130mm, and it effectively did away with the standard 27.5 …

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Flow Mountain Bike
Flow's First Bite: Trek Fuel EX and Remedy 9.9

Jul 2016

There’s no chairlift or gondola in Squamish, which rules it out for most of the Whistler crowd instantly. You climb to the best bits, and you’re rewarded with loamy, fast, rooty, flowy, singletrack descending, some of the very best we’ve ever ridden. In short, it’s perfect trail/all-mountain bike territory, which made it the ideal testing ground …

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BikeRadar
Trek Fuel EX 9.9 29 first ride review

Jun 2016 · Josh Patterson

It appears Trek’s design team has been paying close attention to the desires of trail riders, many of whom have been gravitating toward short-travel 29ers with slack geometry, and redesigned the Fuel EX accordingly. . .

Highs
  • Spirited handling

  • Good suspension performance

Lows
  • Ultra low bottom bracket might not suit everyone

  • Proprietary headset

Read Review

MTBR
Trek Fuel EX 27.5 Plus joins wide wheel fray

May 2016 · Saris Mercanti

Trek’s beloved Fuel EX is now available in plus sized trims. In addition to larger volume tires, the frame also received frame and suspension changes. - Mtbr.com

Read Review

Dirt Mountainbike
Trek releases Plus sized version of Fuel EX trail bike with metric shock

May 2016 · Smurf

... and a boost in travel

Read Review

VeloNews
Trek Top Fuel 9.8

May 2016 · Lennard Zinn

The carbon fiber Top Fuel ruled in mountain biking’s mid-2000s heyday, and now it’s back and better than ever. Most importantly, Trek has updated the

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MBR
Trek Fuel Ex Jr (2016) review - MBR

Mar 2016 · Paul Burwell

The Trek Fuel Ex Jr is a first time full-susser for the little ripper

Highs
  • Tons of standover clearance; quality suspension components; plenty of stopping power; wide gearing range; proper mountain bike tyres.

Lows
  • Heavy; needs a shorter stem; brake levers lack reach adjustment for smaller hands.

Read Review

Mountain Flyer
First Impressions: Trek Top Fuel 9.8 SL

Mar 2016

Who wouldn’t have expected the updated Trek Top Fuel’s shining point to be climbing? Its predecessor was a World Cup-winning XC race bike and the Top Fuel has now replaced the company’s other race bike, the Superfly. With larger wheels, improved suspension and other updates, the Top Fuel is poised to carry on Trek’s XC race heritage.

Read Review

Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, Carbon Armor, ABP Convert, Full Floater, E2 tapered head tube, BB95, internal derailleur & dropper post routing, ISCG 05 mount, magnesium EVO link, 120mm travel

BB StandardBB95, 95.5mm, Press Fit

Bottom Bracket

BB95, 95.5mm, press-fit

Headset

Cane Creek IS-3, E2, carbon cartridge

Stem

Bontrager XXX, Carbon, 31.8mm, 7 degree

Handlebar

Bontrager Race X Lite Carbon Riser, 31.8mm, 15mm rise

Saddle

Bontrager Evoke RXL Carbon, carbon rails

Seatpost

RockShox Reverb Stealth, 2-bolt head, 31.6mm, zero offset

TypeDropper

Groupset
Rear Derailleur

Shimano XTR, Shadow Plus

Crank

Shimano XTR, 32T

Shifters

Shimano XTR, 11 speed

Cassette

Shimano XTR, 11-40, 11 speed

Brakes

Shimano XTR Trail hydraulic disc

TypeShimano XTR Hydraulic Disc

Wheels
Rims

Bontrager Rhythm Elite Tubeless Ready w/TLR strips, RapidDrive, Stacked Lacing, 142x12 rear, 15mm front

Tires

Bontrager XR3 Team Issue, Tubeless Ready, 27.5x2.35" front, 27.5x2.20" rear

Rider Notes
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First added June 29

Last updated June 29

Not listed for 3,271 days