React X9 Black Cassette

**Note: These Cassettes only come as a pack of 4** The KMC cassettes offer unbeatable fluidity and smoothness when linked with their own chains. Not only this, but they have been carefully developed to link with all compatible chains within the 9X range. Carefully crafted shift ramps ensure smooth and steady chain control and improve shifting performance and efficiency. **Features** * Lifting Ramps: The unique lifting ramp design carries the chain smoothly upward on the cog. * Lowering Ramps: Aligns the chain safe, quickly and smoothly * Perfect compatibility: The KMC cog teeth design perfectly pairs with KMC chains, the reduced friction leads to perfect drivetrain coordination and increased durability **Tech Specs** * Compatibility: HG Driver * Material: High Tensile Steel * Finish: ED Black * **Weight per cassette: 0.35kg** **Great ratios** * KX30: 11-13-15-17-19-21-24-28-32T * KX31: 11-13-15-18-21-24-28-32-36T