The DFC drilled Geomet-coated rotor for the 2020–2021 Polestar 1 rear is cast from premium G3000/G11H18 iron and retains an OE vane layout to encourage effective heat dissipation. Precision mill-balancing and a fine-turned 16 RMS surface improve initial pad and rotor seating, while Geomet coating protects against corrosion. Disc thickness variation and lateral runout are held within strict tolerances.

DFC 20-21 Polestar Polestar 1 Rear Drilled Hi-Carbon Alloy Geomet Coated Rotor