BBB Cycling RollerBoys 12T SR Pulley Wheels SRAM Compatible High Performance Composite Material 12 speed Groupsets Durable and Efficient Derailleur Jockey BDP 10

SRAM COMPATIBLE: The RollerBoys Pulley Wheels are compatible with 12-speed SRAM road groupsets EFFICIENT SHIFTING: These derailleur pulley's makes shifting gears a breeze thanks to its 12-teeth pattern DURABLE: These SRAM jockey wheels are stronger than regular Nylon materials thanks to a 40% glass-fiber mix STEALTHILY QUIET: Sealed CrMo bearings make for a silent operation compared to pulley wheels without ball bearings PULLEY SIZE: the pulley wheels made from EMS Swiss composite material come in size 12T