Shimano Ultegra GRX RD-R8000/RX812 tension and guide pulley setThis product is a Genuine Shimano replacement partFor Ultegra and GRX RD-R8000 RD-R8050 RD-RX800 RD-RX805 RD-RX812 rear derailleursFor a full exploded diagram of all spares please refer to www.si.shimano.com
