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It's right for you if...
You're looking for the kind of performance advantages that come only from the kind of enduro race bikes that rip it up on the World Tour. You want the swift, precise shifting of a wireless electronic drivetrain, and you like going fast, getting rowdy, and railing corners all the way to the top step of the podium.
The tech you get
A stout OCLV Mountain Carbon frame, a 160mm RockShox Lyrik Ultimate fork with plush DebonAir spring and Charger 2 RC2 damper that gives you more adjustment and control, and 150mm of rear travel with a RockShox Deluxe RT3 shock featuring Trek's exclusive RE:aktiv with Thru Shaft damper. Plus, a fully wireless SRAM X01 Eagle AXS 1x12 electronic drivetrain and RockShox Reverb AXS dropper post, powerful Shimano XT 4-piston hydraulic disc brakes, Bontrager Line Carbon 30 wheels with a 54-tooth Rapid Drive hub for quick acceleration when you need it most, and a Bontrager Line Pro OCLV carbon handlebar.
The final word
There's not a single part on this bike that wasn't made for ripping it up at insane speeds on the wildest enduro courses in the world. It has high-end everything, including a fully wireless drivetrain and dropper post. Slash 9.9 is fast, tough, fast, fun, fast. Did we mention this bike is fast?
favorite_borderWhy you'll love it
- The SRAM X01 Eagle AXS drivetrain is smart, smooth, and completely wireless
- RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
- 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
- Mino Link lets you adjust the geometry, so you get both an enduro race bike and an ultra-capable trail bike in one
- Make it yours: it's fully customizable through Project One
"One of the best"
"It felt like we just unlocked a super power. Speeds increased, cornering confidence went way up, and traction gains made us feel like pushing harder. It's clear this bike was made to move."
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"Eats up everything"
"It’s for big mountain days, crushing rock filled descents and popping off the lips of jumps all while climbing back to the top with a smile on your face."
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"Sort of magic"
"You could spend less on a YT, Canyon or Fezzari, get nicer parts, a carbon frame, and you’d probably be happy as a clam—just as long as you never threw a leg over this bike. There’s a sort of magic about it that has me wanting to ride it over my other, much fancier bikes."
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"Perfect do-it-all enduro bike"
"Going downhill, the handling is impressively versatile. It’s agile, but not nervous, composed, but not cumbersome. No matter which trail you’re on, with the Trek you’re on the right bike."
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Features
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.
Trek's Straight Shot frame design optimizes the stiffness-to-weight ratio for a more responsive ride. You'll be able to push harder and stay more planted on your line when the going gets rough.
RE:aktiv with Thru Shaft gives you unmatched grip and control with a shock that reacts to the terrain faster than anything else out there.
Trek's mountain-specific carbon fiber is tougher carbon, with unique materials and layup procedures, Trek's advanced engineering, and a higher standard of testing.
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Suspension Calculator
This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.
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Complete Tubeless System
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.
Carbon Care Wheel Loyalty Program
Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.
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Mino Link adjustable geometry
Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.
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Warrantied for life
Carbon wheels can give your ride an instant upgrade in speed and handling—and when you choose Bontrager, your investment is protected. All Bontrager carbon wheels are backed by a lifetime warranty for the original owner.
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Control Freak Cable Management
The lightest, quietest, most versatile cable management system allows any combination of shift, brake, lockout, and dropper post lines to be routed through the frame for clean looks and the ultimate custom setup.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon main frame & stays, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 150mm travel |
|---|---|
| Fork | RockShox Lyrik Ultimate, DebonAir spring, Charger 2 RC2 damper, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 160mm travel |
| Shock | RockShox Deluxe RT3, DebonAir spring, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 230x57.5mm |
| Max compatible fork travel | 160mm |
| Front wheel | Bontrager Line Carbon 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Rear wheel | Bontrager Line Carbon 30, Tubeless Ready, 54T Rapid Drive, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle |
| Rear skewer | Bontrager Switch thru axle, removable lever |
| *Tire |
Size:
S, M, L, XL Bontrager SE4 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 60 tpi, 29x2.40'' |
|
Size:
S, M, L, XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60'' |
|
| Tire part | Bontrager TLR valve, 50mm |
| Max tire size | 29x2.60" |
| Shifter | SRAM Eagle AXS, wireless, 12-speed |
|---|---|
| Rear derailleur | SRAM X01 Eagle AXS |
| *Crank |
Size:
S SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 170mm length |
|
Size:
M, L, XL SRAM X01 Eagle AXS Carbon, DUB, 32T alloy ring, Boost (52mm chainline), 175mm length |
|
| Bottom bracket | SRAM DUB, 92mm, PressFit |
| Cassette | SRAM XG-1295 Eagle, 10-50, 12 speed |
| Chain | SRAM XX1 Eagle, 12 speed |
| Max chainring size | 34T |
| Saddle | Bontrager Arvada, austenite rails, 138mm width |
|---|---|
| *Seatpost |
Size:
S RockShox Reverb AXS, 100mm travel, wireless, 31.6mm, 340mm length |
|
Size:
M RockShox Reverb AXS, 125mm travel, wireless, 31.6mm, 390mm length |
|
|
Size:
L RockShox Reverb AXS, 150mm travel, wireless, 31.6mm, 440mm length |
|
|
Size:
XL RockShox Reverb AXS, 170mm travel, wireless, 31.6mm, 480mm length |
|
| Handlebar | Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 820mm width |
| Grips | Bontrager XR Trail Elite, alloy lock-on |
| Stem | Bontrager Line Pro, 35mm, Knock Block, 0 degree, 50mm length |
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom |
| Brake | Shimano XT M8120 4-piston hydraulic disc |
| *Brake rotor |
Size:
S, M, L, XL Shimano RT76, 180mm, 6-bolt |
|
Size:
S, M, L, XL Shimano RT76, 203mm, 6-bolt |
| Weight | M - 13.18 kg / 29.06 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). |
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
Inseam
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 175.0 cm
5'3.4" - 5'8.9"
76.0 - 82.0 cm
29.9" - 32.3"
L
174.0 - 188.0 cm
5'8.5" - 6'2.0"
82.0 - 88.0 cm
32.3" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
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 | 39.4 | 64.8° | 74.1° | 10.0 | 65.6° | 58.9 | 35.2 | 2.1 | 43.3 | 5.1 | 11.4 | 117.1 | 75.7 | 41.6 | 60.8 |
| 15.5 | S | Low | 39.4 | 64.3° | 73.6° | 10.0 | 65.1° | 59.1 | 34.5 | 2.8 | 43.5 | 5.1 | 11.7 | 117.2 | 75.1 | 41.0 | 61.2 |
| 17.5 | M | High | 41.9 | 64.8° | 74.1° | 10.0 | 65.6° | 60.4 | 35.2 | 2.1 | 43.3 | 5.1 | 11.4 | 118.6 | 75.9 | 43.1 | 60.8 |
| 17.5 | M | Low | 41.9 | 64.3° | 73.6° | 10.0 | 65.1° | 60.6 | 34.5 | 2.8 | 43.5 | 5.1 | 11.7 | 118.7 | 75.3 | 42.5 | 61.2 |
| 19.5 | L | High | 47.0 | 64.8° | 74.1° | 11.0 | 65.6° | 63.5 | 35.2 | 2.1 | 43.3 | 5.1 | 11.4 | 121.9 | 77.0 | 45.9 | 61.8 |
| 19.5 | L | Low | 47.0 | 64.3° | 73.6° | 11.0 | 65.1° | 63.7 | 34.5 | 2.8 | 43.5 | 5.1 | 11.7 | 121.9 | 76.4 | 45.3 | 62.2 |
| 21.5 | XL | High | 52.1 | 64.8° | 74.1° | 12.5 | 65.6° | 66.1 | 35.2 | 2.1 | 43.3 | 5.1 | 11.4 | 124.7 | 78.1 | 48.1 | 63.1 |
| 21.5 | XL | Low | 52.1 | 64.3° | 73.6° | 12.5 | 65.1° | 66.3 | 34.5 | 2.8 | 43.5 | 5.1 | 11.7 | 124.8 | 77.5 | 47.5 | 63.5 |