BBB Cycling 2x 10 T Derailleur Jockey Wheels I Rear Wheel Pulleys For 7 8 9 and Speed Shimano, SRAM Campagnolo Shimano RollerBoys BDP 01

SHIFT GEARS EFFICIENTLY: These derailleur jockey wheels makes shifting gears a breeze thanks to it's 10-teeth pattern WIDELY COMPATIBLE: Suitable for use with a range of systems: Shimano 7-speed, 8-speed, 9-speed, and 10-speed, Campagnolo 7-speed, 8-speed, 9-speed, and 10-speed, and SRAM 7-speed, 8-speed, 9-speed, and 10-speed DURABLE: The derailleur jockey wheels are stronger than regular Nylon materials thanks to a 40% glass-fibre mix STEALTHILY QUIET: Sealed CrMo bearings make for a silent operation compared to pulley wheels without ball bearings URBAN AND ROAD BIKES: These jockey wheels are perfect for road bikes equipped with either Campagnolo, Shimano, or SRAM