The Shimano RT-CL900 disc brake rotor provides quiet and consistent braking control for any terrain.

Consistent braking performance on any long, steep descent thanks to excellent heat dissipation
Robust arm shape for quiet operation without sacrificing weight or heat dissipation
Heat dissipation paint boosts performance
Includes lock ring with internal serration Shimano Disc Brake Rotor DuraAce RT-CL900 Centerloc 140mm