As the fastest oversized pulley wheel system on the market, the CeramicSpeed Oversized Pulley Wheel System (OSPW System) has been developed to answer the increasing demand for improved drivetrain performance. The OSPW System optimises the overall efficiency of your drivetrain thanks to the extremely low friction of the CeramicSpeed Bearings and the unique design of the overall system.

The CeramicSpeed Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world. The OSPW X System reduces friction 35-40% over the stock pulley configuration. The lightweight custom molded carbon fiber cage ensures durability. This design allows the use of the same length chain as stock pulleys.

The 14-tooth upper and 18-tooth lower pulley profiles ensure stable chain retention without added drag.

The OSPW X System is developed, designed and handbuilt in Denmark - and test proven globally.

Only compatible with 1X specific derailleurs.