The Shimano Claris CSHG50 8-Speed 11-28T Road Cassette offers silky smooth shifting and durability. The Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. It has a close gear ratio preventing power loss through finer cadence control. It is perfect for 8-speed drive trains. Key Features: - 8-Speed - 11-28T - 11-13-15-17-19-21-24-28T - Hyperglide Sprockets - Close Ratio Gearing - Narrow 8-Speed HG Chains Compatible - Nickel-Plated Finish - Corrosion-Resistant Steel Cassette Lockring