SHIMANO Ultegra Di2 RD-R8050 Rear Derailleur 11-Speed Pulley Bolts – Pair – Y3HR98050
The following are an “A” match which indicates that the parts are the same in materials, appearance, finish and size etc.
– Shimano GRX Di2 RD-RX817
– Shimano GRX Di2 RD-RX815
– Shimano Ultegra RX RD-RX805-GS
Original Shimano parts guarantee that all components work perfectly for optimum performance and maximum safety and longevity.