BBB AluBoys Jockey/Pulley Wheels Grey 11/12T BDP-21

QUICK SHIFTING PERFORMANCE: The AluBoys derailleur jockey wheels make shifting gears a breeze thanks to the 11-teeth pattern and their extra stiff build. WIDELY COMPATIBLE: The derailleur jockey wheels are suitable for use with Shimano, SRAM and Campagnolo systems with 9- 10- and 11-speed. DURABLE & LIGHT: The Pulleys are made of 7075 aluminium alloy, making them incredibly tough with the benefit of being very lightweight. ULTRA SMOOTH: High-quality sealed bearings make for exceptional smoothness and durability. REAR DERAILLEURS: These aluminium jockey wheels make your chain roll incredibly smoothly over the 11-teeth pattern.