Product Info Lighter, stronger and even more durable. Flattop technology creates a quieter, longer lasting chain for long rides and countless shifts. Compatible with 12-speed road and 13-speed gravel cassettes. Hard Chrome plated inner link plates and rollers for reduced wear and prolonged life Cut-outs in inner and outer link plates for weight reduction Includes Flattop PowerLock SRAM Model ID: CN-FRC-E1