Increase your range and shifting performance with the KMC REACT 11-speed cassette. Designed to work with 11-speed mountain drivetrains the REACT cassette offers exceptionally smooth shifting and increased performance due to the wider gear range offerings that will help modernize your 11-speed system.

• Shifting Ramps for smooth and steady chain control
• Designed to perfectly pair with KMC chains
• Increased durability and friction
• Preferential gear range options
• Made from High Tensile Steel