Genuine Shimano replacement part. For use with Shimano Ultegra RD-R8000 rear derailleurs, and GRX RX-800/RX805/RX812. Can also be used with the Shimano Ultegra Di2 RD-R8050 Rear Derailleur. Precision sealed bearings in both guide and tension pulleys keep drivetrain smooth and friction-free.
Best Price: £19.00 from Merlin Cycles