Ultegra/GRX/XT rear derailleur replacement guide and tension pulley set

Features

• Suitable for a range of rear derailleurs Ultegra RD-R8000/R8050, RX800/RX805, GRX RD-RX812/RX817 and XT M8000/M8050
• Its recommended that you replace your derailleur pulley wheels periodically for the best shifting performance
• Set comprises of two pulley wheels and is a genuine Shimano replacement part