High quality Shimano HG41 11-30T 8-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 to reduce weight without reducing rigidity. Nickel-plated finish offers hard wearing resistance to corrosion, with a corrosion-resistant steel cassette lockring. For 8-speed HG chains.