In The Box
The CeramicSpeed OSPW System has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts over standard Shimano systems.
The Oversized Pulley Wheel (OSPW) System for Shimano 9100/8000 is an industry leading product, chosen by many of the world's leading cycling teams and professional triathlete's.
This OSPW System features a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimisation of the rear derailleur. The upper and lower oversized aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings.
This specific system is compatible with Ultegra 8000-SS/8050-SS/8050-GS mechanical and Di2 rear derailleurs and Dura Ace 9100-SS/9150-SS mechanical and Di2 rear derailleurs. This system is not compatible with Ultegra 8000-GS (long cage) rear derailleurs.