High quality 8-speed cassette. Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. MegaRange gearing gives a super-low 34T sprocket making it easier to climb even the steepest of hills. Sprockets are cut away to reduce weight without reducing rigidity. Nickel-plated finish offers hard wearing resistance to corrosion. Corrosion-resistant steel cassette lockring. For 8-speed HG chains.