CeramicSpeed OSPW Aero Shimano 9250/8150 Blk Coated
CeramicSpeed OSPW Aero Shimano 9250/8150 Blk Coated, The worlds fastest Pulley Wheel system just got faster. OSPW Aero features a lifetime warranty and is wind-tunnel tested to have 40% less friction compared to a stock derailleur, making it perfect for time trials or triathlons.