The revised brake discs with Ice Technology Freeza heat dissipation reduce temperatures again significantly and thus ensure consistent braking performance and a longer service life of the brake pads. The design with an aluminum core between two stainless steel layers effectively dissipates heat via the integrated cooling fins. Locking ring: internal gearing. Compatible pads: Metal/Resin. Material specifications: Rotor: stainless steel/aluminum/stainless steel. Adapter: Aluminum.