Shimano Brake disc with magnet nut CL Int RT-CL900

• Quieter than ever, but with superb, consistent braking performance on all long, steep descents, thanks to excellent heat dissipation
• New arm shape is more robust, offering quieter operation
• Heat-dissipating paint enhances performance

Features

Thanks to reduced heat deformation, the new brake disc offers greater efficiency, less noise, and without sacrificing weight or heat dissipation.