The Shimano HG41 8-Speed Cassette is a good performance 8-speed cassette. Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load. The sprockets are cut away and drilled to further reduce weight without reducing rigidity. A chrome-plated finish offers hard wearing resistance to corrosion. Also comes with a chrome-plated steel cassette lockring. Designed for 8-speed HG chains.