AeroRotor Ring

One of the key advantages of a true big brake upgrade for BMW is that the rotor friction surface can be replaced. When the rotors wear out and are below their minimum thickness you can order a new ring. You won't have to buy a new ring, hat, and hardware like on some other kits. This helps keep consumable costs down. You can even change to a new rotor style as long as the rotor size stays the same. StopTech rotor rings come with new hardware and instructions. Unbolt the hat from your old ring and transfer it to the new disc with the new hardware. The new assembled rotor is ready to be installed. Follow the pad manufacturer's instructions for bedding in the pads.