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It's right for you if...

You want a big bike with big wheels to roll over big things and send big hits. You might enter some enduro races, but you mostly just want to rail sketchy descents faster than anyone else in your crew.

The tech you get

An aluminum frame built for harsh riding with a threaded bottom bracket, dual downtube guards, Knock Block 2.0, and 160mm of travel with a RockShox Super Deluxe shock for long descents and 170mm RockShox Lyrik Select+ fork. Plus, a SRAM GX Eagle drivetrain with an extra-low 52-tooth gear, and complete tubeless Line Comp 30 wheels.

The final word

Slash 8 puts serious enduro performance within reach with smart choices on spec that won't empty your wallet. The aluminum frame, burly suspension, and 1x12 Eagle drivetrain makes for a ride that's equally at home on the race course and on a big, backwoods session.

The Walkthrough

favorite_borderWhy you'll love it

  1. A sleek internal storage compartment gives you a versatile spot to stow tools and gear
  2. We added a second down tube guard to better protect your frame from shuttle-related damage
  3. It's equally at home between the tape and in the rugged wild—Yes, Slash is a race bike, but it's ridiculously fun on gnarly trail rides, too
  4. New, removable Knock Block has a bigger steering angle to keep cables and hoses safe without sacrificing turning radius
  5. Wider seat tube, wider dropper—the 34.9mm diameter post is stronger, more durable, and moves up and down faster

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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.

Learn more

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.

Learn more
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.

Rapid Drive 54 rear hub

Rapid Drive 54 rear hub

With 54 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.


*spec applies to all sizes unless otherwise noted

Frame Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, Control Freak internal routing, downtube guard, shuttle guard, threaded BB, ISCG 05, 34.9mm seat tube, magnesium rocker link, Mino Link, ABP, Boost148, 160mm travel
Fork RockShox Lyrik Select+, DebonAir spring, Charger 2.1 RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 170mm travel
Shock NEW RockShox Super Deluxe Ultimate, DebonAir spring, Thru Shaft 3-position damper, 230x62.5mm
Front wheel Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Rear wheel Bontrager Line Comp 30, Tubeless Ready, 6-bolt, 54T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle
Rear skewer Bontrager Switch thru axle
*Tire Size: S , M , ML , L , XL
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40''
Size: S , M , ML , L , XL
Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.60''
Tire part Bontrager TLR valve, 50mm
Shifter SRAM GX Eagle, 12 speed
Rear derailleur SRAM GX Eagle
*Crank Size: S
SRAM X1 Eagle, DUB, 30T steel ring, Boost (55mm chainline), 170mm length
Size: M , ML , L , XL
SRAM X1 Eagle, DUB, 30T steel ring, Boost (55mm chainline), 175mm length
Cassette SRAM Eagle XG-1275, 10-52, 12 speed
Chain SRAM GX Eagle, 12 speed
Saddle Bontrager Arvada, hollow chromoly rails, 138mm width
*Seatpost Size: S
TranzX JD-YSP39, 100mm travel, internal routing, 34.9mm
Size: M , ML
TranzX JD-YSP39, 150mm travel, internal routing, 34.9mm
Size: L , XL
TranzX JD-YSP39, 170mm travel, internal routing, 34.9mm
Handlebar Bontrager Line, alloy, 35mm, 27.5mm rise, 820mm width
Stem Bontrager Line, 35mm, Knock Block, 0 degree, 40mm length
Headset 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 4-piston hydraulic disc
*Brake rotor Size: S , M , ML , L , XL
SRAM CenterLine, 6-bolt, round-edge, 180mm
Size: S , M , ML , L , XL
SRAM CenterLine, 6-bolt, round-edge, 200mm
Weight M - 15.04 kg / 33.15 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
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 off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.


Rider Height


All measurements provided in cm unless otherwise noted.

Frame size number Frame size letter Geometry position 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 39.5 67.1° 76.1° 10.0 64.6° 58.4 35.2 2.2 43.5 4.3 13.0 119.7 71.2 43.1 61.8
15.5 S Low 39.5 66.6° 75.6° 10.0 64.1° 58.5 34.5 2.9 43.7 4.3 13.4 119.7 70.6 42.5 62.1
17.5 M High 42.0 67.1° 76.1° 10.0 64.6° 60.9 35.2 2.2 43.5 4.3 13.0 121.2 75.0 45.6 61.8
17.5 M Low 42.0 66.6° 75.6° 10.0 64.1° 61.0 34.5 2.9 43.7 4.3 13.4 122.2 74.4 45.0 62.2
18.5 ML High 43.5 67.1° 76.1° 10.5 64.6° 62.8 35.2 2.2 43.5 4.3 13.0 124.2 75.0 47.4 62.2
18.5 ML Low 43.5 66.6° 75.6° 10.5 64.1° 62.9 34.5 2.9 43.7 4.3 13.4 124.3 74.4 46.9 62.6
19.5 L High 45.0 67.1° 76.1° 11.5 64.6° 64.7 35.2 2.2 43.5 4.3 13.0 126.3 76.0 49.1 63.1
19.5 L Low 45.0 66.6° 75.6° 11.5 64.1° 64.9 34.5 2.9 43.7 4.3 13.4 126.4 75.4 48.6 63.5
21.5 XL High 50.0 67.1° 76.1° 14.0 64.6° 68.3 35.2 2.2 43.5 4.3 13.0 130.4 78.0 52.1 65.4
21.5 XL Low 50.0 66.6° 75.6° 14.0 64.1° 68.4 34.5 2.9 43.7 4.3 13.4 130.5 77.4 51.6 65.8

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