2019 Trek

Top Fuel 9.9 SL

A 27.5″ / 29″ carbon frame full suspension crosscountry bike with ultra high-end components.
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MSRP$8,799
Weight22.0 lbs  
FrameCarbon
SuspensionFull, 100 / 100mm
ForkRockShox SID
Wheels27.5″ / 29″ Carbon
Drivetrain1 × 12
GroupsetXX1 Eagle
BrakesHydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Top Fuel 9.9 SL
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)

29 mph

Top Fuel 9.9 SL

27 mph

Similar Bikes

Highest gear

(descending)

Reviews
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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Bicycling
The Trek Top Fuel Finds Trail Religion and Is Reborn as a Fun Trail Bike

Jun 2019

The new Trek Top Fuel Pulls the XC-race stick out of its butt and joins the trail bike party.

Highs
  • It's super light and fast as hell.

  • It's versatile—adjust the Mino Link and stem angle to fit your riding style.

Lows
  • TwistLoc system quickly gummed up and functioned inconsistently.

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BIKE Magazine
First Impressions: 2020 Trek Top Fuel 9.9 XX1 | $9,000

May 2019

Trek's new Top Fuel XC race bike comes stock with 2.4-inch tires and a dropper post. A proper dropper. And while these are just a couple of the parts choices made by Trek's mountain bike development team, they're strong indicators of what this new bike is all about: more.

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Whistler Mountain Bike
2019 Trek Top Fuel 9.8 SL 1st Ride Impression

Feb 2019 · Dale Tiessen

This is a XC race bike, and I should ride it as such without a dropper.

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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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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, ABP, Full Floater, EVO link, tapered head tube, Mino Link, MicroTruss, Control Freak internal routing, Carbon Armor, PF92, Boost148 & G2 Geometry on 29ers, 100mm travel

BB StandardBB86/BB92, Press Fit

Fork

RockShox SID SE Carbon, DebonAir, Motion Control damper, TwistLoc remote lockout, tapered steerer, G2 Geometry w/51mm offset on 29ers, Boost110, 100mm travel

Travel100mm

Spring TypeAir

Bottom Bracket

SRAM DUB Press Fit, 92mm

Headset

FSA IS-2, 1-1/8˝ top, 1.5˝ bottom

Stem

Bontrager Pro, 31.8mm, 7 degree

Handlebar

Bontrager XXX, OCLV Carbon, 31.8, zero rise

Saddle

Bontrager Montrose Pro, carbon rails

Seatpost

Bontrager XXX, OCLV Carbon, 31.6mm, zero offset

TypeRigid

Pedals

Not included

Groupset
Rear Derailleur

SRAM XX1 Eagle, Roller Bearing Clutch

Crank

SRAM XX1 Eagle Dub, 34T Direct Mount

Shifters

SRAM XX1 Eagle, 12 speed

Cassette

SRAM XG-1299, 10-50, 12 speed

Chain

SRAM XX1 Eagle

Brakes

SRAM Level Ultimate carbon hydraulic disc

TypeHydraulic Disc

Wheels
Rims

Bontrager Kovee Pro 30 carbon, Tubeless Ready, 108T Rapid Drive, Boost110 front, Boost148 rear (15.5: 142x12 rear), tubeless strips included, valves sold separately

Tires

Bontrager XR2 Team Issue, Tubeless Ready, 120 tpi, aramid bead, 29x2.20˝ (13.5 & 15.5: 27.5x2.20˝)

Rider Notes
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Last updated September 16
Not listed for 1,650 days