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2017 Trek

Top Fuel 9

A 27.5″ / 29″ aluminum frame full suspension crosscountry bike with high-end components.
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Manufacturer Price

$3,999
Weight25.8 lbs  
FrameAluminum
SuspensionFull, 100 / 100mm
ForkFox Performance Float 32
ShockFox
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 11
GroupsetX1
BrakesSRAM Level TLM Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Top Fuel 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

27 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 Top Fuel is a highly efficient cross-country bike praised for its climbing prowess, light weight, and responsive handling. Its suspension offers superb small-bump compliance, making it a favorite for XC racing and marathon events. However, some reviews note limitations in descending capability due to narrow handlebars and steep head angles.

Pros
  • Efficient climber

  • Light weight carbon frame

  • Superb small-bump compliance

  • Adjustable geometry with Mino Link

  • Quick and efficient handling

Cons
  • Front end could feel twitchy on tough descents

  • Narrow handlebars hinder descending

  • Limited travel for large hits

  • Bontrager tires underperform in technical terrain

Key Quotes
The small-bump compliance is superb for an XC rig. It feels like it has more than 100 millimeters of travel.
BIKE Magazine logoBIKE Magazine
One of our favorite bikes, the gets a refresh and becomes more capable without (hopefully) losing any of its sharpness.
Bicycling
Could it be the embodiment of our dream bike?
Enduro Mountainbike Magazine logoEnduro Mountainbike Magazine
The Trek Top Fuel 9 manages to tread a fine line between a taut and lithe XC race machine and a bike that most riders would be happy to use for general trail duty.
MBR logoMBR

Feedback?

View all reviews

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.

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

Read Review

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.

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

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.

Read Review

Bicycling
First Ride: Trek Top Fuel 9.8 SL

Sep 2015 · Gloria Liu

The reincarnated version of this World Cup-winning XC racer gets modern updates and a hella-fast ride

Read Review

MTBR
Trek Procaliber SL, Top Fuel and Fuel EX 29 revamped

Jul 2015 · Jeroen Tiggelman

Turning its focus on its cross-country racing bikes, Trek made some significant changes to its XC line. Most notable is the introduction of the Isospeed coupler in to the Procaliber hardtail line. - Mtbr.com

Read Review

BikeRadar
Trek Top Fuel 9.9 SL first ride review

Jun 2015 · Josh Patterson

For 2016, the Top Fuel returns to Trek’s line as a thoroughly modern cross-country racer, incorporating a lightweight carbon frame, wider axle spacing, adjustable geometry and Trek’s size-specific wheelsize strategy. . .

Read Review

Geometry
Specs
Build
Frame

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

BB StandardBB86/BB92, Press Fit

Fork

Fox Performance 32 Float, Step Cast, Grip 2-position remote 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 remote damper, tuned by Trek Suspension Lab, 6.5x1.5"

Travel100mm

Bottom Bracket

PF92

Headset

Integrated, cartridge bearing, sealed, 1-1/8" top, 1.5" bottom

Stem

Bontrager Pro, 31.8mm, 7 degree, Blendr compatible

Handlebar

Bontrager Race Lite, 31.8mm, 5mm rise

Saddle

Bontrager Montrose Elite, hollow titanium rails

Seatpost

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

TypeRigid

Grips

Bontrager Race Lite, lock-on

Groupset
Rear Derailleur

SRAM X1, Roller Bearing Clutch

Crank

SRAM X1 1200, 32T Direct Mount X-Sync

Shifters

SRAM X1, 11 speed

Cassette

SRAM XG-1150, 10-42, 11 speed

Chain

SRAM PC 1130

Brakes

SRAM Level TLM hydraulic disc

TypeSRAM Level TLM Hydraulic Disc

Wheels
Rims

Bontrager Mustang Pro, Tubeless Ready, Boost110 front, Boost148 rear (15.5: 142x12 rear) (tubeless strips and valves sold separately)

Tires

Bontrager XR1 Team Issue, Tubeless Ready, Inner Strength sidewalls, 120 tpi, aramid bead, 29x2.20" (15.5: 27.5x2.20")

Rider Notes
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First added April 12

Last updated July 21

Not listed for 3,234 days