Mountain Bikes

Trek Slash 9.9

By: Mason Arnold

Last Update:

TREK SLASH 9.9 2020 [Review]



This bike is considered as the fastest mountain bike in its family and it is very efficient as a racing bike because of its ThruShaft, OCLC carbon frame, Rockshox Lyrik ultimate, and other features. The trek slash 9.9 has a set of wheels that is suitable for different terrains, can move really fast, and is also tough.

So, riders can comfortably go for rides without worrying about the wheels. Also, the bike has a feature that keeps your cables protected, and this feature is known as the control freak cable management. With this feature, your bike can still look nice and clean, even with all the necessary cables in the right places.


This bike’s frame is made of OCLV carbon, which is very tough and offers durability. The frame is well designed with other features like the control freak cable managements which offers clean cable routing, the seat stay can be adjusted to fit your taste and terrain. Regardless of your area in terms of terrain, the trek slash 9.9 can move smoothly over any obstacle and its frame plays a major part in doing this.


Another interesting feature of this bike is its adjustable geometry. This means that the trek slash 9.9 has the mino link through which the bike can adjust its geometry. The mino link makes it possible for riders to adjust or set their bikes to the high or low mode, it gives you the option to either choose a slack or slacker position (geometry) without affecting the performance of your suspension.


The trek slash 9.9 has the SRAM’s Eagle drivetrain which offers speed and control on different terrains. With its SRAM GX and X101 Eagle drivetrain, the bike can boast of high-performance and speed. The drivetrain (SRAM X101) helps to lower the weight in the cassette and generally, offers smooth shifting. While the SRAM GX; 12-speed drivetrain improves the quality of your ride.


Frame; OCLV carbon frame, seatstay, control freak cable management, mino link, 150mm travel, knock block, ISCG 05, cable armor, Magnesium rocker link, boost148

Shock; RE:aktiv with ThruShaft, 230×57.5mm, DebonAir Spring, RockShox Deluxe RT3

Fork; charger 2 RC2 damper, RockShox Lyrik ultimate, 15mm  maxle stealth, 42mm offset, DebonAir spring, tapered steerer, 16mm travel, Boost110

Front wheel; tubeless ready, 15mm axle thru, Bontrager line carbon 30, 6-bolt

Rear wheel; 12mm thru axle, SRAM XD driver, tubeless ready, Bontrager line carbon 30, 6-bolt, 54T rapid drive, Boost148

Tires; Tubeless ready, Bontrager SE4/SE5 team issue, core strength sidewall, 60tpi, aramid bead, 29×2.40

Rear derailleur; SRAM X01 Eagle

Chain; 12-speed, SRAM GX Eagle

Cassette; SRAM XG-1275 Eagle, 12-speed, 10-50

Bottom bracket; 92mm, Pressfit, Bottom bracket SRAM DUB

Handlebar; 35mm, Bontrager line Pro, handlebar 27.5mm rise, OCLV carbon, 820mm width

Brake; shimano XT, hydraulic disc, M8120 4-piston

Headset; 1.5 inches bottom, 58-degree radius, 1-1/8 inches top, knock block integrated, headset cartridge bearing

Stem; Bontrager line pro, 0-degree, knock block, 50mm length, 35mm

Grips; alloy lock-on, Bkntrager XR trail elite

  • The trek slash 9.9 is very fast.
  • The bike is strong and durable.
  • It is still very efficient and fast even on rough terrains.
  • The bike is expensive but its value equates its quality.


Is the trek slash 9.9 suitable for rough terrains?

Yes, the bike is designed to do well on rough terrains. It is also efficient in climbing and descending hills.


The trek slash 9.9 is a mountain bike of high-performance, with features that enable it to offer speed, durability, comfort, and efficiency. The bike comes in different sizes but with similar features and setting it up would need an expert but in all, it is a good racing bike.