CeramicSpeed OSPW X Pulley Wheel System Shimano GRX RX820 2x12 - Coated Races Aluminum Pulley Carbon Cage BLK MFPN=BX-BL130DIPR-BK When paired with Rally 110

When paired with Rally 110 the upgrade spindle turns your system into a Rally 210 power meter providing left/right balance data and cycling dynamics

Resin top shell

This incredible tool reconditions scrapers to a near-perfect edge in seconds

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CeramicSpeed OSPW X Pulley Wheel System Shimano GRX RX820 2x12 - Coated Races Aluminum Pulley Carbon Cage BLK MFPN=BX-BL130DIPR-BK When paired with Rally 110This 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. Largest Cog 36