Shimano Rt-cl900 Lock Externo Brake Disc

With a focus on reducing the heat distortion of the disc brake rotor, the new disc brake rotor delivers quieter braking performance than ever before without compromising weight or heat dissipation.Features:- Quieter than ever, and superior, consistent braking performance on long, steep descents thanks to excellent heat dissipation- The new arm shape is more robust for quieter operation- Heat-dissipating coating increases performance- Centerlock- With external notchesSpecifications:- Outer diameter (mm): 160- Lockring: With lockring (with external notches)