2022 Trek

Top Fuel 8

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

$3,999
Weight31.4 lbs  
FrameAluminum
SuspensionFull, 120 / 120mm
ForkRockShox SID
ShockRockShox Deluxe Ultimate
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetXT, Deore
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Top Fuel 8
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)

26 mph

Top Fuel 8

26 mph

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Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

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Sizing
17.5"

5'1" – 5'6"

Rider Fit Notes

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Price History
Reviews
BikeRadar
Trek Top Fuel 8 review

May 2022 · Tom Marvin

An absolute hoot to ride on all but the gnarliest tracks, a true trail bike even if on paper it doesn’t look it

Highs
  • Shrugs off limited travel figures on 95% of trails

  • Loves to twist and turn

  • Fast-rolling rubber helps keep speeds high

Lows
  • Fork can twang under heavier riders

  • You’re occasionally reminded of the 120mm travel

Read Review

Enduro Mountainbike Magazine
Trek Top Fuel 9.9 XX1 AXS – In our 2022 downcountry group test

Mar 2022 · Peter Walker

In our big 2022 downcountry group test, we pitted the Trek Top Fuel 9.9 XX1 AXS against 5 of the hottest bikes of the year. Read the full review to find out what it’s capable of and how it stacks up against the competition. Hit the link for the full review and a list with all other bikes in test.

Highs
  • Freedom of movement downhill

  • Firm and efficient rear suspension generates plenty of traction

  • Intuitive handling

  • Practical detail solutions and clean look

Lows
  • Very wide handlebars

Read Review

Bike Perfect
Trek Top Fuel 8 review: a progressive rather than podiuming XC machine

Mar 2022 · Guy Kesteven

Trek’s Top Fuel delivers superlative short-travel suspension performance but it’s definitely a trail bike not an XC bike

Highs
  • Infectiously agile and playful vibe

  • Superlative suspension feel

  • Seriously tight tracking frame

  • Trail tough kit

  • Internal storage

Lows
  • Too heavy for XC racing

  • Simple fork damper

  • Tight internal storage access

  • Yawning gap between this and the Supercaliber

Read Review

NSMB
2022 Trek Top Fuel

Feb 2022

Shore Country? Dad Country? No no, this one is "fast trail"

Read Review

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

Read Review

Beta
Trek Introduces the New Top Fuel

Oct 2021 · Ryan "Squirrel" LaBar

Adding fire to the Fuel

Read Review

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

Read Review

Flow Mountain Bike
2022 Trek Top Fuel Review | All-new frame & geometry, with a whole new attitude

Oct 2021

The Trek Top Fuel has been overhauled for 2022, receiving an all-new frame with integrated storage, plus key updates to the suspension design and geometry. So how does it ride on the trail? And will everyone be pleased with all the changes? Read on for our Trek Top Fuel review.

Highs
  • Brilliant trail-ripping geometry

  • Active and supportive suspension

  • Masses of cornering grip & stability

  • Refined and practical frame design

  • Downtube storage is a welcome addition

Lows
  • Dropper post is sluggish

  • Wheels are solid but quite heavy

  • Carbon bars are harsh

  • Heavier than many of its competitors

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel

BB StandardBSA, 73mm, Threaded

Tire Clearance2.5"

ColorsCrimson; Mulsanne Blue

Fork

RockShox SID, DebonAir spring, Rush RL damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel

Travel120mm

Spring TypeAir

Shock

RockShox Deluxe Ultimate RCT, 185mm x 50mm

Travel120mm

Bottom Bracket

Shimano SM-BB52, 73mm, threaded external bearing

Headset

Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom

Stem

Bontrager Elite, 35mm, 0 degree, 45mm length

Handlebar

Size: S, Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width; Size: M, ML, L, XL, XXL, Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width

Saddle

Bontrager Arvada, steel rails, 138mm width

Seatpost

Size: S, TranzX JD-YSP39, 100mm travel, internal routing, 34.9mm; Size: M, ML, TranzX JD-YSP39, 150mm travel, internal routing, 34.9mm; Size: L, XL, XXL, TranzX JD-YSP39, 170mm travel, internal routing, 34.9mm

TypeDropper

Grips

Bontrager XR Trail Comp, nylon lock-on

Groupset
Rear Derailleur

Shimano XT M8100, long cage

Crank

Size: S, M, ML, L, Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length; Size: XL, XXL, Shimano Deore M6120, 30T ring, 55mm chainline, 175mm length

Shifters

Shimano XT M8100, 12 speed

Cassette

Shimano SLX M7100, 10-51T, 12 speed

Chain

Shimano SLX M7100, 12 speed

Brakes

Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper

TypeHydraulic Disc

Wheels
Rims

Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'', Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''

Front Hub

Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle

Rear Hub

Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano MicroSpline freehub, Boost148, 12 mm thru axle

Tires

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

Disc Rotors

Size: S, M, ML, L, XL, XXL, Shimano RT66, 6-bolt, 160mm; Size: S, M, ML, L, XL, XXL, Shimano RT66, 6-bolt, 180mm

Rider Notes
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Last updated June 22
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