Slash 9.9 XO1 [2021]

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Slash 9.9 is the fastest enduro mountain bike in the lineup, so it’s no surprise it’s the go-to ride for the pros of Trek Factory Racing Enduro. A full carbon frame, all-new hard-charging suspension, fast-rolling carbon wheels, and SRAM’s newest X01 Eagle drivetrain make this top-of-the-line ride the undisputed king of enduro.

Last updated on February 3, 2023 2:59 pm

Price History

Price history for Slash 9.9 XO1
Latest updates:
  • $8,549.99 - December 23, 2022
  • $12,749.99 - October 6, 2022
Since: October 6, 2022
  • Highest Price: $12,749.99 - October 6, 2022
  • Lowest Price: $8,549.99 - December 23, 2022


The reason why Slash 9.9 XO1 2021 is an interesting bike is because of its full carbon frame. The full carbon frame ensures that you can use it for years together. Not only that, it has fast-rolling carbon wheels as well. While there are a few other mountain bikes with carbon frame but seldom do they have carbon wheels. That is why durability is unparalleled. The carbon wheels are smooth and have minimal friction. Apart from this, there are many features of this bike that help it stand out. We will cover these features below.

Excellent suspension system

The bike has a hard charging suspension system. The hard charging suspension does not undergo damage even on the harshest terrain. However, instead of just looking at this, it is time to go into the suspension system’s details to understand why it can keep you comfortable even on the rough and uneven mountains.

The shaft ensures that shocks are very well absorbed. Not only that, the efficient air spring ensures that you are comfortable on your saddle. Air spring requires little to no maintenance. There will be no bumps at all.

There is a shaft damper on offer as well. The main job of the damper is to reduce the shocks further. Lesser shocks are sure to provide you with maximum comfort during bumpy mountainous terrain.

These three features ensure that the grip and control which you get are excellent. You can navigate any terrain due to the same.

The excellent suspension system also reduces wear and tear.

Slash 9.9 XO1 2021

Carbon fiber frame

Another reason to go for this bike is because of the carbon fiber frame. The wheels’ carbon fiber ensures that you will not have to worry about replacing the bike or the tires anytime soon. The combination of these features help you use it for years together.

Efficient braking mechanism

Since the braking system is independent of acceleration, you can stop the bike at a short distance. When you’re covering mountainous terrain, this feature can provide you with the confidence and stability you need. It will keep you safe and sound in the mountains.

The braking system doesn’t require much maintenance either. You can use this bike day in and day out without any worry.

Thus, this bike’s carbon fiber construction helps it stand out and adds to the durability and stability.


  • Carbon fiber frame
  • Excellent suspension system
  • Carbon fiber wheels
  • Efficient braking power
  • Smooth wheels

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Additional information

Specification: Slash 9.9 XO1 [2021]


Trek Bikes



RockShox ZEB Ultimate


NEW RockShox Super Deluxe Ultimate


NEW Bontrager Line Elite 30


Bontrager alloy

Rim strip

Bontrager TLR


SRAM X01 Eagle, 12 speed

Rear derailleur



SRAM X01 Eagle

Bottom Bracket



SRAM Eagle XG-1275, 10-52, 12 speed


SRAM GX Eagle 12-Speed


Bontrager Arvada, austenite rails, 138mm width


Bontrager Line Elite Dropper


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


Bontrager XR Trail Pro, alloy lock-on


Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 35mm length


Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom


SRAM Code RSC 4-piston hydraulic disc

Brake rotors

SRAM CenterLine


M – 14.12 kg / 31.14 lbs (with TLR sealant, no tubes)

Weight limit

300 lbs

Slash 9.9 XO1 [2021] Videos

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