The Alcon Pro‑System replacement rotor for Brembo 12‑bolt D bobbin mounting (DIV4212C) is the right‑side unit sized 328x42x64mm, intended to match that specific mounting design. Supplied as a direct replacement, it restores proper rotor dimensions, thickness and bobbin mounting on the right side for applications using DIV4212C‑style Brembo rotors.
Alcon Pro-System 328x42x64mm 12-Bolt D Bobbin Mounting (DIV4212C) Brembo Replacement Rotor - Right