Upgrade your performance with the proven power of the CeramicSpeed OSPWX Ultegra RX800/805 Pulley Wheel System. Hand-built in Denmark this 13-tooth lower and 19-tooth upper high-end OSPW System has been platform proven at major events like Paris Robaix, Strada Bianche and CX World Cups. The CeramicSpeed OSPWX Ultegra RX800/805 Pulley Wheel System reduces friction 35-40% over stock pulley configuration. Meeting the neds for durability, low friction and longevity, the system t is built for gravel and cross disciplines. The four spring tension settings allow customised setup based on ride conditions and offers custom melded carbon fibre cage for lightweight and durability.

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