Ceramicspeed OSPW RS 5-Spoke for Shimano 105 R7150 Derailleur Pulley (Black)

Description

CeramicSpeed's OSPW system replaces the stock Shimano derailleur cage and pulley wheels with a larger-diameter pulley set, which reduces how sharply the chain has to articulate as it runs through the derailleur. Less articulation means less friction, and over a full ride that adds up to a real, if m