These SRAM BlackBox Ceramic Bearing Pulleys enable you to upgrade your current system to reduce friction, increase stiffness and improve the life of your components. Designed to have a sound dampening effect thanks to AeroGlide technology, for a super-efficient and silent ride experience.AeroGlide Pulleys, with a sound dampening effect,For upgrading your current system to reduce friction and increase stiffness,Can improve the life of your components.
Reduce friction, increase stiffness, decrease weight, and add durability to your rear derailleur with these SRAM X01 jockey wheels.
SRAM XX1 Jockey Wheels BlackBox Ceramic Hybrid Bearing X-Sync 11speed