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2015 Trek

Slash 9.9 27.5

A 27.5″ carbon frame full suspension enduro bike with ultra high-end components.
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FrameCarbon
SuspensionFull, 160 / 160mm
Wheels27.5″ Aluminum
Drivetrain1 × 11
GroupsetXTR
BrakesShimano XTR Hydraulic Disc
SeatpostDropper
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Insights
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)

24 mph

Slash 9.9 27.5

26 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
  • 5'10", size 18.5", Just right
Reviews

Summary

The Trek Slash is a highly capable enduro bike, praised for its finely tuned suspension system, excellent traction, and versatile performance across various terrains. Its ABP suspension and RockShox Monarch Plus DebonAir shock deliver a smooth, bottomless feel, making it a standout for descending. While it excels in handling and comfort, some reviews note the lack of a lock-out feature and occasional pedal bob.

Pros
  • Finely tuned suspension system

  • Excellent traction and handling

  • Versatile performance across terrains

  • ABP suspension for smooth braking

  • RockShox Monarch Plus DebonAir shock

Cons
  • Lack of lock-out feature

  • Occasional pedal bob

  • Some models lack high-end components

Key Quotes
The Slash 8 doesn’t have a weak part on it.
BIKE Magazine logoBIKE Magazine
Grip it and rip it. Or don't. Either way, you'll love the ride.
Bicycling
Trek’s cheapest trail/enduro bike proves that if you get the basics right, you don’t need a ton of bling to build an enjoyable and impressively capable ride.
BikeRadar logoBikeRadar

Feedback?

View all reviews

Dirt Mountainbike
Trek launch the almighty Slash 29

Jul 2016 · Sjones

Flagship enduro bike gets 29" wheels

Read Review

Canadian Cycling Magazine
Trek's redesigned enduro racer the Slash 29 unveiled

Jul 2016 · Philippe Tremblay

Redesigned to meet the needs of top level racers

Read Review

Enduro Mountainbike Magazine
Trek Slash 9 27.5 2015 Review

Dec 2015 · Trev Worsey

We head to the Scottish Highlands to test the Trek Slash 9 to it's limits.

Read Review

Mountain Bike Action
Bike Test: Trek Slash 9.8

Aug 2015 · McCoy

Long story short, this bike rips

Read Review

Bicycling
Tested: Trek Slash 9.8 27.5

Jun 2015 · Bicycling Staff

A carbon-frame, 27.5 enduro rig with 160mm of shockingly versatile suspension

Read Review

BikeRadar
Trek Slash 7 - first ride review

Jun 2015 · Guy Kesteven

A great category-blurring blend of trail fast, black run beasting entertainment at a cost that normally creates compromise

Read Review

BIKE Magazine
Preview: Trek Slash 8 27.5

Jan 2015

Trek's Remedy might be better known, but the Slash is the real bruiser in Trek's all-mountain/enduro line up. The Trek Slash 8 27.5 might just be the best buy in the 2015 Slash line.

Read Review

Flow Mountain Bike
So Enduro: Trek Slash 9.8 Review

Jan 2015

Changing the recipe can be a disaster for an established brand – remember what happened to VB when they dropped the alcohol volume, and seriously, why did Vegemite ever make Cheeseymite anyway? Trek knows this well. After countless design variants in the early 2000s, half a dozen years ago they hit a winning formula with …

Highs
  • So enduro.

  • Grips like a scared cat.

  • Wide rims.

  • Ideal spec.

Lows
  • Wheels are quite weighty.

Read Review

Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, Carbon Armor, ABP Convert, Full Floater, E2 tapered head tube, BB95, internal derailleur & dropper post routing, ISCG 05 mount, magnesium EVO link, Mino Link, 160mm travel

BB StandardBB95, 95.5mm, Press Fit

Bottom Bracket

BB95, 95.5mm, press-fit

Headset

Cane Creek IS-3, E2, carbon cartridge

Stem

Bontrager Rhythm Pro, 31.8mm, 0 degree

Handlebar

Bontrager Rhythm Pro Carbon Riser, 31.8mm, 15mm rise

Saddle

Bontrager Evoke 3, hollow titanium rails

Seatpost

RockShox Reverb Stealth, 2-bolt head, 31.6mm, zero offset

TypeDropper

Groupset
Rear Derailleur

Shimano XTR, Shadow Plus

Crank

Shimano XTR, 32T

Shifters

Shimano XTR, 11 speed

Cassette

Shimano XTR, 11-40, 11 speed

Brakes

Shimano XTR Trail hydraulic disc

TypeShimano XTR Hydraulic Disc

Wheels
Rims

DT Swiss EX1501 Spline One, tubeless tape & valves, 142x12 rear, 15mm front

Tires

Bontrager XR4 Team Issue, Tubeless Ready, 27.5x2.35"

Rider Notes
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First added June 29

Last updated June 29

Not listed for 3,256 days