OSPW X Pulley Wheel System for Shimano GRX RX820 2x12-Speed auto rack 5-millimeter internal tubeless EA90 SL

5-millimeter internal tubeless EA90 SL rim that combines lateral stiffness and aerodynamics with a 27mm rim depth

The Grail CB7 proves that smoother is faster by combining lateral stiffness with the soft riding feel

62-66 degree chainstay angle

Polymers prevents washout and water emulsification

OSPW X Pulley Wheel System for Shimano GRX RX820 2x12-Speed auto rack 5-millimeter internal tubeless EA90 SLThis OSPW X system for Shimano GRX RX820 2x12 speed rear derailleurs is built for gravel and cross disciplines and meets the needs for durability, low friction and longevity. The four spring tension settings allow customised setup based on ride conditions, and the handbuilt OSPW System offers custom molded carbon fiber cage for lightweight and durability. CeramicSpeed OSPW Systems reduces friction 35 40% over stock pulley configuration. Robust cage