Shimano Ultegra Pulley Set (RD-R8000)Shimano premium road bike tension pulley set for the Ultegra R8000 11-speed rear derailleur. Precision sealed bearings on both pulleys ensure low-friction gearing and easy handling. Shimano Ultegra Pulley Set (RD-R8000)Shimano premium road bike tension pulley set for the Ultegra R8000 11-speed rear derailleur. Precision sealed bearings on both pulleys ensure low-friction gearing and easy handling. COMPATIBLE SERIES:ULTEGRA R8000 Series, ULTEGRA R8050 Series, ULTEGRA RX800 Series, GRX 11 speed, DEORE XT M8000 Series, DEORE XT M8050 Series, GRX DI2