Shimano 11 Speed Pulley / Jockey Wheel Set for Ultegra R8000/R8050/RX/GRX Series derailleurs.
Fits Shimano - RD-R8000-GS, RD-R8000-SS, RD-R8050-GS, RD-R8050-SS, RD-RX800-GS, RD-RX805-GS, RD-RX812
Contains: 1x Guide pulley wheel (upper) & 1x Tension pulley wheel (lower).
MPN: Y3E998010