Girodisc recommends slotted rotors for all high performance applications. The edges of the slots continuously clean and refresh the pad surface. This will allow the pads to have a maximized friction surface always available. Additionally, they prevent containments from collecting between the pad and disc interface. The disc is lightened, decreasing its rotational inertia. Slots also prevent the formation of a water film on the disc in wet weather, maintaining the best brake response. All one piece rotor offerings are either zinc plated or e-coated to prevent corrosion in the areas not continuously swept by the pads.