BBB RollerBoys 13T-13T Shimano compatible rollers

The BBB RollerBoys 13T-13T pulleys are designed to improve the smoothness and reliability of the drivetrain on Shimano 12-speed mountain bike groupsets. Made from EMS Swiss Grivory composite material reinforced with 40% fiberglass, they offer an excellent balance of lightness, stiffness, and durability, even under intensive use.

The rollers are equipped with sealed bearings protected by an aluminum cover, ensuring smooth rotation and effective protection against dust, mud, and moisture. Their design optimizes chain stability and reduces friction, thus contributing to improved overall drivetrain performance. With a 13-tooth profile, these rollers ensure precise and reliable operation while maintaining a low weight of only 30 grams.