Shimano RD-RX825/RX820 GRX rear mech pulley set: GRX rear derailleur replacement guide and tension pulley set Suitable for GRX RD-RX825 and RD-RX820 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 Product Type – Pulley Sets Discipline – Gravel & Cyclocross Colour – Black Colour – Silver Size – One size
