CeramicSpeed Ceramic Pulley Wheel Red Sram 11-Speed?

CeramicSpeed makes some of the strongest, most accurate, and lightest rolling bearings on the market, which are all ceramic.

Ceramic bearings also provide better utilization of one's wattage.

For Sram's 11-speed rear derailleurs, both mechanical and electronic.

Made of aluminum and with ceramic bearings.

626 tenants.