This product is a TREK brand idler pulley set, designed for use with the Slash V2 model. This idler pulley set is essential for ensuring the smooth operation of your mountain bike's drivetrain. Made with high-quality materials, this set guarantees durability and optimal performance during your mountain rides. Its specific design ensures a perfect fit with the bike's suspension system, providing a smooth and efficient riding experience. Easily replace your bike's old idler pulley with this cog idler pulley set, for a reliable and worry-free ride.