2020 Trek

Top Fuel 9.9

A 29″ carbon frame full suspension crosscountry bike with ultra high-end components.
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Manufacturer Price

$8,999
Weight24.5 lbs  
FrameCarbon
SuspensionFull, 115 / 120mm
ForkFox Factory Float 34
ShockFox Float DPS Factory
Wheels29″ Carbon
Drivetrain1 × 12
GroupsetXX1 Eagle
BrakesHydraulic Disc
SeatpostDropper
Top Comparison
Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Top Fuel 9.9
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 9.9

27 mph

Similar Bikes

Highest gear

(descending)

Reviews
Pinkbike
Field Test Review: 2022 Trek Top Fuel - Same Name, Different Bike

Dec 2021 · Henry Quinney

For a bike that is so capable on the descents, though, the Top Fuel still packs a mighty punch when it comes to gaining elevation..

Highs
  • Great suspension performance

  • Frame storage

  • Strong climbing performance

Lows
  • Knockblock isn't as well executed as other brand's versions

  • Works well when pushing hard, but might not be the most comfortable for all

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Beta
Trek Introduces the New Top Fuel

Oct 2021 · Ryan "Squirrel" LaBar

Adding fire to the Fuel

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MBR
Trek Top Fuel 8 review: brings in-frame storage to aluminium bikes - MBR

Oct 2021 · Danny Milner

New Trek Top Fuel 8 is a short travel - 120mm travel front and rear - down-country trail bike with internal frame storage for both alloy and carbon models.

Highs
  • Sublime suspension, playful handling, fantastic size range, internal storage

Lows
  • Not particularly light for the intended use, inconsistent Shimano brakes on our test bike

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Mountain Flyer
First Impressions: Trek Top Fuel 9.8 GX

Oct 2020

My history of mountain biking started with a little wooden trike, with no pedals and wheels bigger than my head. I moved forward as any child does onto a bigger bike with bigger wheels and pedals. My parents always encouraged me to get outside and ride a bike, although I didn’t like the idea of mountain biking. I knew how to ride a bike; why go any further?

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MTBR
Review: Trek Top Fuel 9.9 2020

Apr 2020

- Mtbr.com

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Mountain Bike Action
MBA Bike Test: Trek Top Fuel 9.9

Feb 2020 · McCoy

Outgrowing its cross-country heritage

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BikeRadar
Trek Top Fuel 9.8 review

Jan 2020 · Ed Thomsett

A front-heavy ride position and not-so-grippy tyres are the only limiters on this all-round speed demon

Highs
  • Makes the climbs fun and rips on the way down

  • An elegant package with a choice of colours

  • The six frame sizes span a massive range

Lows
  • A higher front end would give more descending confidence

  • Thin tyres don’t offer much grip or protection

  • Carbon wheels and bar bump up the price without a big impact on performance

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Enduro Mountainbike Magazine
Trek Top Fuel 9.9 in review

Oct 2019 · Trev Worsey

This year, the Trek Top Fuel has had a ground-up makeover, adding more travel, slacker geometry, more clearance, and most importantly a change in attitude.

Highs
  • Nimble and involving handling

  • Happy to step-up to tough terrain

Lows
  • Lockout is niche and adds complexity

  • SRAM Level brakes prioritise weight over power

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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, magnesium rocker link, Mino Link, ABP, Boost148, 115mm travel

BB StandardBB86/BB92, Press Fit

Tire Clearance2.4"

ColorsMatte Carbon / Gloss Trek Black; Trek Black to Teal Fade; Viper Red

Fork

Fox Factory 34 Step-Cast, Float EVOL air spring, FIT4 2-position damper, dual remote lockout, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm Kabolt axle, 120mm travel

Travel120mm

Spring TypeAir

Shock

Fox Factory Float, 2-position DPS damper, Kashima Coat, 190x45mm

Travel115mm

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

Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 60mm length

Handlebar

Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width

Saddle

Bontrager Montrose Pro, 7x10mm carbon rails, 138mm width

Seatpost

Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm, 340mm length

TypeDropper

Groupset
Rear Derailleur

SRAM XX1 Eagle

Crank

SRAM XX1 Eagle Carbon, DUB, 32T alloy ring, Boost (52mm chainline), carbon, 170mm length

Shifters

SRAM XX1 Eagle, 12 speed

Cassette

SRAM XG-1295 Eagle, 10-50, 12 speed

Chain

SRAM XX1 Eagle, 12 speed

Brakes

SRAM Level Ultimate hydraulic disc, carbon levers, 180mm front rotor, 160mm rear rotor

TypeHydraulic Disc

Wheels
Rims

Bontrager Kovee Pro 30 carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle

Tires

Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40''

Disc Rotors

Size: S, SRAM CenterLine, 6-bolt, round-edge, 160mm; Size: S, SRAM CenterLine, 6-bolt, round edge, 180mm

Rider Notes
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Last updated July 25
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