Shimano Jockey Wheels.
Shimano Pulley Set RD-6800 6870 - Jockey Wheels - 11T - For Ultegra - Y5YC98140
Shimano Pulley Set RD-R8000, RX800 Jockey Wheels 11T for Ultegra, GRX Y3E998010
Shimano Pulley Set RD-6700 - Jockey Wheels - Y5X998150 - Ultegra, XT, Saint 11T
Shimano Pulley Set RD-M6000 SGS - Jockey Wheels - 11T for SLX Long Cage 10-Speed
Shimano Pulley Set RD-M6000 GS - Jockey Wheels - 11T - SLX Medium Cage 10-Speed
Shimano Pulley Set RD- M3020, M2000, M370 And more see Compatibility 7/8/9 Spd
