CeramicSpeed OSPW Shimano 9100/R8000 Series Gold, One Size

The CeramicSpeed OSPW Shimano 9100/R8000 Series is an oversized pulley wheel system designed for Shimano 9100 and R8000. The aluminum pulley wheels are extremely durable and come in a size of a 13-tooth upper pulley and a 19-tooth lower pulley. This system is designed to improve our riding by providing energy savings starting from 2. 4 watts compared to the standard Shimano systems.