CeramicSpeed Pulley Wheels - OSPW | Alpha Disc | 13/19 Teeth - silver

Replacement jockey wheels for selected Oversized Pulley Wheel systems (OSPW) from CeramicSpeed. The disc-shaped Alpha models are made of aluminum and feature teeth made of a composite material. Version for OSPW RS and OSPW Aero systems which the manufacturer has equipped with a pulley wheel combination of 13 and 19 teeth. Compatibility: OSPW RS for Shimano Dura Ace / Ultegra Di2 (RD-R9250 / RD-R8150) OSPW RS for Shimano 105 Di2 (RD-R7150) OSPW Aero for Shimano Dura Ace / Ultegra Di2 (RD-R9250 / RD-R8150) (manufacturer recommendations, listing not final) Scope of supply: 1 pair of derailleur pulleys (tension and guide pulley)