Shimano CS-HG500 10-speed cassette 11-25T. The CS-HG500 is a good quality 10 speed road bike cassette. It comes with sprockets that are cut away & drilled to reduce weight without sacrificing rigidity. The CS-HG500 cassette uses Hyperglide sprockets for crisper shifting & is nickel plated for durability. Features High quality 10-speed cassette Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load Sprockets are cut away & drilled to reduce weight without reducing rigidity Nickel-plated finish offers hard wearing resistance to corrosion Corrosion-resistant steel cassette lockring For 10-speed road HG chains