2020 Trek

Slash 8

A 29″ aluminum frame full suspension enduro bike with high-end components.
Compare the full range

MSRP$3,699
Weight30.4 lbs  
FrameAluminum
SuspensionFull, 150 / 160mm
ForkRockShox Yari RC
ShockRockShox Deluxe RT3
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetGX Eagle, Truvativ Descendant
BrakesHydraulic Disc
SeatpostDropper
Where to Buy
Similar Bikes

For This Bike

Accessories
Top Comparison
Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Slash 8
Other Enduro 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

Slash 8

26 mph

Similar Bikes

Highest gear

(descending)

Reviews
BikeRadar
Trek Slash 8 review

Apr 2021 · Robin Weaver

The Slash 8 strikes the perfect balance between a fun and lively feel, and ultimate chaos-calming composure

Highs
  • Easy to ride, very natural feeling geometry

  • Great kit for the cash

  • Easy to throw about yet still calm and stable when it needs to be

  • Seriously impressive suspension

Lows
  • Tyres aren’t the best in damp mud

Read Review

Beta
The Beta Tests: Trek Slash 9.8

Mar 2021 · Lydia Tanner

The Trek Slash has been 29-inch-only since 2016, and the 2021 version is evidence of its head start in the big-wheel enduro category.

Highs
  • Superb high-speed stability

  • Great traction in variable terrain

  • Supple and generous-feeling suspension

Lows
  • Less maneuverable at slow speeds

  • A lot of bike to get back up the hill

Read Review

NSMB
2021 Trek Slash 9.9 XO1 - Full Review

Feb 2021

Riding a bike like the Slash over the winter on the North Shore is a rough test scenario, but Trek's newest long travel trail bike has proven up to the task...

Read Review

Bike Perfect
Trek Slash 9.9 X01 Enduro MTB review

Feb 2021 · Guy Kesteven

We took the Trek Slash 9.9 X01 to our toughest local trails to see how its new shape and unique shock translate to the real world

Highs
  • Phenomenal rear suspension

  • Easy setup

  • Awesome aggro geometry

  • Precision accuracy

  • High control cockpit

  • Internal storage

  • Efficient pedaling

  • Threaded BB

  • Optional steering lock

Lows
  • More confident with switched tires

  • ZEB fork requires some patience

  • Deserves better wheels

  • Short dropper on small sizes

  • Seriously grounded rather than playful

Read Review

Loam Wolf
Long-Term Review: Trek Slash 9.9 XO1

Dec 2020 · Mike Wirth

The new Trek Slash 9.9 X01 sees many updates making it an even more capable all-mountain, enduro mountain bike. See how it performed.

Read Review

Pinkbike
Field Test: 2021 Trek Slash - Ready to Race

Dec 2020 · Mike Kazimer

The Slash received multiple updates for 2021, but it's still an enduro race machine at heart.

Highs
  • Light and stiff frame – encourages you to go fast

  • Great shock tune

  • In-frame storage

  • Wide range of available frame size options

Lows
  • Seat tube angle could still be a bit steeper

  • Shorter cranks and an even longer dropper post would have been nice to see

Read Review

Freehub
Bike Review | 2021 Trek Slash 9.9 X01

Oct 2020 · Spencer Johnson

The venerable Trek Slash is back for 2021, armed with more suspension travel than ever before. The new Trek Slash 9.9 X01 comes equipped with the ever-capable, 170-millimeter RockShox ZEB Ultimate fork and a custom, 160-millimeter RockShox Super Deluxe Ultimate shock, placing it squarely in the hard-charging enduro category. For me, one of the most welcome updates for the new Slash is the seat angle, which has been steepened to 75.6 degrees, putting the rider’s weight directly between the wheels—and making for a much more comfortable seated position while climbing. The relatively long reach of 486 millimeters, together with the mid-length chainstay of 437 millimeters, creates a bike that stays firmly planted while you sweat your way to the top of a mountain. But the most impressive feature of the new Slash is its impressively light weight—something I wouldn’t automatically expect from a bike in the longer-travel range, especially one with 29-inch wheels. The lightweight frame construction and ultra-light build of the 9.9 X01 version I tested was noticeable from the moment I started huffing up my first climb.

Read Review

Bikerumor
2021 Trek Slash gets more travel, custom thru-shaft shock, Knock Block 2.0 & hidden storage

Sep 2020

Trek redesigns the Slash for 2021, going longer, lower and slacker to make a mean enduro machine with a few tricks up its sleeve.

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 150mm travel

BB StandardBB86/BB92, Press Fit

Tire Clearance2.6"

Fork

RockShox Yari RC, DebonAir spring, Motion Control RC damper, tapered steerer, Boost110, 15mm Maxle Stealth, 160mm travel

Travel160mm

Spring TypeAir

Shock

RockShox Deluxe RT3, DebonAir spring, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 230x57.5mm

Travel150mm

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 Line, 35mm, Knock Block, 0 degree, 50mm length

Handlebar

Bontrager Line, alloy, 35mm, 27.5mm rise, 820mm width

Saddle

Bontrager Arvada, hollow chromoly rails, 138mm width

Seatpost

Size: S, Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length; Size: M, M/L, Bontrager Line Dropper, 125mm travel, internal routing, 31.6mm, 395mm length; Size: L, XL, Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length

TypeDropper

Grips

Bontrager XR Trail Elite, alloy lock-on

Groupset
Rear Derailleur

SRAM GX Eagle

Crank

Size: S, Truvativ Descendant 6k Eagle, DUB, 32T steel ring, Boost (52mm chainline), 170mm length; Size: M, M/L, L, XL, Truvativ Descendant 6k Eagle, DUB, 32T steel ring, Boost (52mm chainline), 175mm length

Shifters

SRAM GX Eagle, 12 speed

Cassette

SRAM XG-1275 Eagle, 10-50, 12 speed

Chain

SRAM GX Eagle, 12 speed

Brakes

SRAM Guide R 4-piston hydraulic disc, 200mm front rotor, 180mm rear rotor

TypeHydraulic Disc

Wheels
Rims

Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, Rear: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, 54T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle

Tires

Size: S, M, M/L, L, XL, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40''; Size: S, M, M/L, L, XL, Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.60''

Disc Rotors

Size: S, M, M/L, L, XL, SRAM CenterLine, 6-bolt, round-edge, 180mm; Size: S, M, M/L, L, XL, SRAM CenterLine, 6-bolt, round-edge, 200mm

Rider Notes
Riders Also Viewed

Last updated August 21
Not listed for 1,310 days