The DFC Geomet-coated rotor for 2006–2021 BMW 228i rear is a hi-carbon alloy replacement that adds corrosion-resistant Geomet protection to an OE-style cooling design. Constructed from premium G3000/G11H18 iron castings with OE vane configuration, it promotes effective heat dissipation. Precision mill-balancing minimizes vibration for smoother stopping; the fine-turned 16 RMS finish aids initial pad break-in and DTV (0.10 mm) and lateral runout (0.50 mm) remain within tight limits.

DFC 06-21 BMW 228i Rear Hi-Carbon Alloy Geomet Coated Rotor