This is an updated version of the Oversized Pulley Wheel System for Shimano 9100/9150 and 8000 SS/8050 SS. Installation instructions for both this and the older version can be found in our support area.

This new design features an integrated stop tower for easier installation. The CeramicSpeed Oversized Pulley Wheels System has proven to be the fastest pulley system in the world, offering energy savings of at least 2.4 watts compared to standard Shimano systems.

The OSPW system for Shimano 9100/9150 and 8000 SS/8050 SS is an industry-leading product chosen by many of the world's top cycling teams and professional triathletes. It is equipped with a 13-tooth upper guide wheel and a 19-tooth lower idler wheel to ensure absolute optimization of the derailleur. The oversized aluminum pulley wheels are available with either standard or coated CeramicSpeed bearings.

Please 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 the clutch-equipped Ultegra RD RX800 & RX805. A compatible RX800 & RX805 version can be found in our OSPW X for Shimano RX800/805. A compatible upgrade for Ultegra 8000-GS or 8050-GS can be found in our pulleys for Shimano, 11s NW.

Please note that this OSPW, despite design similarities, is not compatible with the 12-speed derailleurs of the Shimano 9200 or 8100 series. The Shimano 9100/8000 OSPW system is compatible with up to a 32-tooth cassette for both Dura Ace and Ultegra derailleurs.