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2021 Trek

Slash 9.9 XTR Gen 5

A 29″ carbon frame full suspension enduro bike with ultra high-end components.

Manufacturer Price

$9,549
Weight30.4 lbs  
FrameCarbon
SuspensionFull, 160 / 170mm
ForkRockShox ZEB Ultimate
ShockRockShox Super Deluxe Ultimate
Wheels29″ Carbon
Drivetrain1 × 12
GroupsetXTR, e*thirteen LG1 Race
BrakesShimano XTR Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Slash 9.9 XTR Gen 5
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)

26 mph

Slash 9.9 XTR Gen 5

26 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Trek Slash is a highly capable enduro bike, praised for its superb high-speed stability, supple suspension, and excellent traction in variable terrain. It offers a floaty, invincible ride quality with cloud-like landings, making it a favorite for rough and technical trails. While it excels in descending, some reviews note it can be less maneuverable at slow speeds and a bit heavy on climbs.

Pros
  • Superb high-speed stability

  • Supple and generous-feeling suspension

  • Great traction in variable terrain

  • Floaty, invincible ride quality

  • Cloud-like landings

Cons
  • Less maneuverable at slow speeds

  • A lot of bike to get back up the hill

  • Lockout a bit harsh and the open mode too mealy on climbs

Key Quotes
It’s the sort of bike that seems to turn the volume down on practically every kind of feature, which of course makes you search for ways to turn the volume back up again.
Beta logoBeta
The new Slash felt almost as though it was hovering above the trail.
BIKE Magazine logoBIKE Magazine
The result is a seriously accurate, phenomenally controlled, track or trail dominating high-velocity weapon that’s still pedal efficient and loaded with practical details for big days out.
Bike Perfect logoBike Perfect

Feedback?

View all reviews

Loam Wolf
Review: Trek Slash 9.9 XO1

Aug 2022

The Trek Slash 9 9 shines on the steeps and excels in the rough, making it an almost perfect rig for enduro racing. Read the full Trek Slash 9.9 XO1 Review here.

Highs
  • Steep terrain crusher

  • Rough terrain performance

  • Fun jumper

Lows
  • Not the best climber

  • Ineffective drain tube

Read Review

Pinkbike
Video: A Closer Look at Jamie Edmondson's Trek Slash Race Bike

Jul 2021 · Pinkbike Originals

We caught up with Jamie Edmondson to get the details on his new Trek Slash.

Read Review

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

Mountain Bike Action
Mountain Bike Action Bike Test: Trek Slash Enduro Bike - Mountain Bike Action Magazine

Feb 2021 · McCoy

One Killer Enduro Machine

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

Flow Mountain Bike
Trek Slash Review | A totally one-of-a-kind custom bike build

Feb 2021

Starting with a new Trek Slash 8 frameset, fellow Flow Frother Ben has chosen a rather eclectic build kit to complete his unique enduro bike. Read on for a closer look at the parts he's chosen, and a detailed explanation of what's worked well, and what hasn't worked so well.

Read Review

Geometry
Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block 2.0, Control Freak internal routing, Carbon Armor, shuttle guard, threaded BB, ISCG 05, 34.9mm seat tube, magnesium rocker link, Mino Link, ABP, Boost148, 160mm travel

BB StandardBSA, 73mm, Threaded

Tire Clearance2.5"

ColorLithium Grey

Fork

RockShox ZEB Ultimate, DebonAir spring, Charger 2.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 170mm travel

Travel170mm

Spring TypeAir

Shock

NEW RockShox Super Deluxe Ultimate, DebonAir spring, Thru Shaft 3-position damper, 230x62.5mm

Travel160mm

Bottom Bracket

E*thirteen BB20-P, BSA threaded, 73mm width

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 Line Pro, 35mm, 0 degree, 50mm length

Handlebar

Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 820mm width

Saddle

Bontrager Arvada, austenite rails, 138mm width

Seatpost

Size: S, Bontrager Line Elite Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 345mm length; Size: M, M/L, Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length; Size: L, Bontrager Line Elite Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 485mm length; Size: XL, Bontrager Line Elite Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 550mm length

TypeDropper

Grips

Bontrager XR Trail Pro, alloy lock-on

Groupset
Rear Derailleur

Shimano XTR M9100, Shadow Plus, long cage, 51T max cog

Crank

E*thirteen LG1 Race Carbon, 30T, 55mm chainline, 170mm length

Shifters

Shimano XTR M9100, 12 speed

Cassette

Shimano XTR M9100, 10-51, 12 speed

Chain

Shimano Dura-Ace/XTR M9100, 12 speed

Brakes

Shimano XTR M9120 4-piston hydraulic disc

TypeShimano XTR Hydraulic Disc

Wheels
Rims

Front: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'', Rear: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''

Tires

Size: S, M, M/L, L, XL, Bontrager SE4 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.40''; Size: S, M, M/L, L, XL, Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60''

Disc Rotors

Size: S, M, M/L, L, XL, Shimano RT86, 6-bolt, 180mm; Size: S, M, M/L, L, XL, Shimano RT86, 6-bolt, 203mm

Rider Notes
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First added November 6

Last updated March 2

Not listed for 827 days