Quieter control for any terrainWith a focus on decreasing disc brake rotor heat deformation, Shimano delivers a new disc brake rotor that&';s quieter than ever. The centerlock 800 rotors provide performance without sacrificing weight or heat dissipation. A quieter, more consistent centerlock rotor from the experts at Shimano. Quieter than ever and with superb, consistent braking performance on any long, steep descents The new arm shape is more robust leading to quieter operation ICE TECHNOLOGIES FREEZA provides consistent braking performance with less brake fade, less noise and longer pad life