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R1 Carbon Geomet Series rotors provide the ultimate stopping power needed for demanding driving and harsh conditions. Manufactured using more Carbon, Chromium, and Molybdenum, these High Carbon rotors offer increased braking performance and strength. A center split core casting provides greater stability. Geomet Coating protects against rust while extending rotor life. Mill balancing and double disc grinding reduces thickness variations for smoother stopping, minimal vibration, and improved break-in.