Magura MDR-C 6 Bolt Disc Brake RotorThe Magura MDR C Disc Brake Rotor is optimized for use on e bikes, these new brake discs provide enhanced performance and stability and they also reduce vibration. The new MDR C rotor is the all rounder in the MAGURA E bike Optimized portfolio for city, trail and e bike. An additional rigid element above the 6 hole mounting reduces vibration during braking, resulting in less noise. Heat resistance and stability have also been enhanced. The must have