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2018 Trek

Top Fuel 8

A 27.5″ / 29″ aluminum frame full suspension crosscountry bike with upper mid-range components.
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Manufacturer Price

$2,799
Weight28.5 lbs  
FrameAluminum
SuspensionFull, 100 / 100mm
ForkFox Rhythm Float 32
ShockFox
Wheels27.5″ / 29″ Aluminum
Drivetrain2 × 11
GroupsetSLX
BrakesShimano Deore Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Top Fuel 8
Other Crosscountry 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

Top Fuel 8

27 mph

Similar Bikes

Highest gear

(descending)

Reviews
Mountain Bike Action
First Look Trek Top Fuel - Mountain Bike Action

Oct 2019 · Brandon

The Top Fuel is Trek’s endurance cross-country race machine built to conquer climbs and inspire confidence on descents.

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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

BikeRadar
Trek Top Fuel 8 review

Jul 2018 · Guy Kesteven

Stiff frame and suspension in classic race style, but wheels are slow and ride feel is conservative. Buy if you want an efficient and trusted ride for your money

Highs
  • Stiff frame with suspension tuned for efficient pedalling, reasonable kit for the cash

Lows
  • Conservative rather than combative handling character and overall feel, wheels and tyres undermine rough rolling speed and liveliness

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MBR
Trek Top Fuel 9 (2017) review - MBR

May 2017 · James Bracey

Swing a leg over the Trek Top Fuel 9 and the first thing you notice is the suspension is keen to get working. It’s a seriously rapid bike on the trails.

Highs
  • Rewarding ride provided by the Re:aktiv suspension.

  • SRAM X1 groupset performed flawlessly.

Lows
  • Handling is marred by the miniscule bar width.

  • Tyres are inappropriate for most British conditions.

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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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Enduro Mountainbike Magazine
Trek Top Fuel 9.8 SL Review

Mar 2016 · Christoph Bayer

Trek gave their Top Fuel a revamp for 2016. We've put the Trek Top Fuel 9.8 SL through its paces to see if the performance can match the looks.

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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.

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BIKE Magazine
Review: Trek Top Fuel 9.8 SL

Feb 2016

The Trek Top Fuel 9.8 SL is a Greyhound designed to cover long distances fast and is tailor-made for über-fit marathon racers.

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Geometry
Specs
Build
Frame

Alpha Platinum Aluminum, ABP, Full Floater, EVO link, E2 tapered head tube, Mino Link, MicroTruss, internal derailleur and dropper post routing, down tube guard, PF92, Boost148 & G2 Geometry on 29ers, 100mm travel

BB StandardBB86/BB92, Press Fit

Fork

Fox Rhythm 32 Float, GRIP adjustable damper, E2 tapered steerer, Boost110, G2 Geometry w/51mm offset on 29ers, 100mm travel

Travel100mm

Spring TypeAir

Shock

Fox Performance Float, RE:aktiv XC 2-position damper, tuned by Trek Suspension Lab, 6.5x1.5˝

Travel100mm

Bottom Bracket

PF92

Headset

FSA IS-2, 1-1/8˝ top, 1.5˝ bottom

Stem

Bontrager Elite, 31.8mm, 7 degree

Handlebar

Bontrager Race Lite, 31.8mm, 5mm rise

Saddle

Bontrager Evoke 2, chromoly rails

Seatpost

Bontrager Rhythm Elite, 2-bolt head, 31.6mm, zero offset

TypeRigid

Pedals

Not included

Grips

Bontrager Race Lite, lock-on

Groupset
Rear Derailleur

Shimano SLX M7000, Shadow Plus

Front Derailleur

Shimano SLX M7020

Crank

Race Face Ride, 36/22

Shifters

Shimano SLX M7000, 11 speed

Cassette

Shimano SLX M7000, 11-42, 11 speed

Chain

KMC X11-1

Brakes

Shimano MT500 hydraulic disc

TypeShimano Deore Hydraulic Disc

Wheels
Rims

Bontrager Duster Elite 23, Tubeless Ready, 54T Rapid Drive, Boost110 front, Boost148 rear (15.5˝: 142x12 rear, 21T), tubeless strips included, valves sold separately

Tires

Bontrager XR2 Team Issue, Tubeless Ready, 120 tpi, aramid bead, 29x2.20˝ (15.5: 27.5x2.20˝)

Rider Notes
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First added February 15

Last updated February 15

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