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It's right for you if...

You're looking to tackle huge days on huge mountains, whether it's an enduro race or an epic adventure. You want the light weight and muted vibes of a carbon frame, and you prioritise tunable suspension performance over a shiny top-shelf drive train.

The tech you get

A full OCLV Mountain Carbon frame with 160 mm of travel and an all-new RockShox Super Deluxe Ultimate shock with an updated Thru Shaft damper, plus an all-new RockShox ZEB fork with extra-beefy 38 mm stanchions. A SRAM GX Eagle drive train with the new 10-52 cassette and Line Carbon 30 wheels with a 54-tooth Rapid Drive hub for quick acceleration when you need it most.

The final word

This is a beast of a mountain bike. You get hot new suspension technology normally reserved for the most expensive bikes, and you get it on a fresh new frame. With Slash 9.8, the faster you go, the better it rides, so giddy-up.

The Walkthrough

favorite_borderWhy you'll love it

  1. The RockShox ZEB fork's bigger 38 mm stanchions help you stay on your line through the chunky stuff, while the updated damper lets you dial in the feel
  2. New, removable Knock Block has a bigger steering angle to keep cables and hoses safe without sacrificing turning radius
  3. We added a second down tube guard to better protect your frame from shuttle-related damage
  4. Wider seat tube, wider dropper – the 34.9 mm diameter post is stronger, more durable, and moves up and down faster
  5. A large internal storage compartment in the down tube lets you stow tools and gear


Features

RockShox Super Deluxe Thru Shaft damper

With the all-new RockShox Super Deluxe Ultimate Thru Shaft, you get the most refined shock on the market, with an updated air spring and an exclusive Thru Shaft damper that gives you tenacious grip, plush control and the support you need for ripping rough descents all day.

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Active Braking Pivot

Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

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Complete frame protection

Complete frame protection

Replaceable down tube guards protect the underside of your frame from rock strikes, trail debris and janky shuttle vehicles so you can forget about damage worries and focus on blasting the next run.

OCLV Mountain Carbon

Trek's mountain-specific carbon fibre is tougher carbon, with unique materials and lay-up procedures, Trek's advanced engineering, and a higher standard of testing.

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Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Frame OCLV Mountain Carbon main frame and stays, internal storage, tapered head tube, Knock Block 2.0, Control Freak internal routing, Carbon Armour, shuttle guard, threaded BB, ISCG 05, 34.9 mm seat tube, magnesium rocker link, Mino Link, ABP, Boost148, 160 mm travel
Fork RockShox ZEB Select+, DebonAir spring, Charger 2.1 RC damper, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 170 mm travel
Shock NEW RockShox Super Deluxe Ultimate, DebonAir spring, Thru Shaft 3-position damper, 230x62.5 mm
Wheels
Wheel front NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle
Wheel rear NEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12 mm thru axle
Hub front Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
Skewer rear Bontrager Switch thru axle, removable lever
*Tyre 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"
Tyre part Bontrager TLR valve, 50 mm
Rim strip Bontrager TLR
Drivetrain
Shifter SRAM GX Eagle, 12-speed
Rear derailleur SRAM GX Eagle
*Crank Size: S
SRAM GX Eagle, DUB, 30T, Boost (55 mm chain line), 170 length
Size: M, M/L, L, XL
SRAM GX Eagle, DUB, 30T, Boost (55 mm chain line), 175 length
Bottom bracket SRAM DUB, 73 mm, BSA threaded
Cassette SRAM Eagle XG-1275, 10-52, 12-speed
Chain SRAM GX Eagle, 12-speed
Components
Saddle Bontrager Arvada, austenite rails, 138 mm width
*Seatpost Size: S
Bontrager Line Elite Dropper, 100 mm travel, internal routing, 34.9 mm, 345 mm length
Size: M, M/L
Bontrager Line Elite Dropper, 150 mm travel, internal routing, 34.9 mm, 440 mm length
Size: L
Bontrager Line Elite Dropper, 170 mm travel, internal routing, 34.9 mm, 485 mm length
Size: XL
Bontrager Line Elite Dropper, 200 mm travel, internal routing, 34.9 mm, 550 mm length
Handlebar Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 820mm width
Grips Bontrager XR Trail Pro, alloy lock-on
Stem Bontrager Line Pro, 35 mm, Knock Block, Blendr-compatible, 0-degree, 35 mm length
Head set Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8" top, 1.5" bottom
Brake SRAM Code R hydraulic disc
*Brake rotor 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, 200 mm
Weight
Weight M - 14.42 kg / 31.8 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

Frame size number Frame size letter Geometry position Wheel size A — Seat tube B — Seat tube angle Effective seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
15.5 S High 29" 39.5 67.1° 76.1° 10.0 64.6° 58.4 35.2 2.2 43.5 4.3 13.0 119.7 71.1 43.1 61.8
15.5 S Low 29" 39.5 66.6° 75.6° 10.0 64.1° 58.5 34.5 2.9 43.7 4.3 13.4 119.7 70.5 42.5 62.1
17.5 M High 29" 42.0 67.1° 76.1° 10.0 64.6° 60.9 35.2 2.2 43.5 4.3 13.0 121.2 74.9 45.6 61.8
17.5 M Low 29" 42.0 66.6° 75.6° 10.0 64.1° 61.0 34.5 2.9 43.7 4.3 13.4 122.2 74.3 45.0 62.2
18.5 ML High 29" 43.5 67.1° 76.1° 10.5 64.6° 62.8 35.2 2.2 43.5 4.3 13.0 124.2 74.9 47.4 62.2
18.5 ML Low 29" 43.5 66.6° 75.6° 10.5 64.1° 62.9 34.5 2.9 43.7 4.3 13.4 124.3 74.3 46.9 62.6
19.5 L High 29" 45.0 67.1° 76.1° 11.5 64.6° 64.7 35.2 2.2 43.5 4.3 13.0 126.3 75.9 49.1 63.1
19.5 L Low 29" 45.0 66.6° 75.6° 11.5 64.1° 64.9 34.5 2.9 43.7 4.3 13.4 126.4 75.3 48.6 63.5
21.5 XL High 29" 50.0 67.1° 76.1° 14.0 64.6° 68.3 35.2 2.2 43.5 4.3 13.0 130.4 77.9 52.1 65.4
21.5 XL Low 29" 50.0 66.6° 75.6° 14.0 64.1° 68.4 34.5 2.9 43.7 4.3 13.4 130.5 77.3 51.6 65.8

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