Shimano RD-RX400 GRX Rear Mech Pulley Set Jockey Wheels

Shimano RD-RX400 GRX Rear Mech Pulley Set

• GRX rear derailleur replacement guide and tension pulley set
• Suitable for GRX RD-RX400 rear derailleur
• 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