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This is an updated version of the oversized pulley system for Shimano 9100/9150 and 8000 SS/8050 SS.
This new design has an integrated stop tower for easier mounting.
The CeramicSpeed oversized pulley system has proven to be the world's fastest pulley system, offering power savings from 2.4 watts compared to standard Shimano systems.
The CeramicSpeed OSPW system for Shimano 9100/9150 and 8000 SS/8050 SS is an industry-leading product, chosen by many of the world's leading professional cycling teams and triathletes.
Featuring a 13-tooth upper pulley and a 19-tooth lower pulley for ultimate rear derailleur optimization. The oversized aluminum upper and lower pulleys are equipped with standard or coated CeramicSpeed bearings.
Note: The OSPW system for 9100/9150 and 8000 SS/8050 SS is NOT compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with clutch-equipped Ultegra RD RX800 and RX805. Please see our OSPW X for Shimano RX800/805 for an RX800 and RX805 compatible version. For a compatible upgrade for Ultegra 8000-GS or 8050-GS, please see our pulleys for Shimano , 11s NW.
Please note that although there are design similarities, this OSPW is not compatible with Shimano 9200 or 8100 12-speed derailleurs.
The Shimano 9100/8000 OSPW system is compatible with up to a 32-tooth cassette for Dura Ace and Ultegra derailleurs
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