Shimano CS HG400 8 speed cassette

Features:High quality 8-speed cassetteHyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load11-40T: MegaRange gearing gives a super-low 40T sprocket making it easier to climb even the steepest of hills11-45T: Gearing gives a super-low 45T sprocket making it easier to climb even the steepest of hillsSprockets are cut away to reduce weight without reducing rigidityNickel-plated finish offers hard wearing resistance to corrosionCorrosion-resistant steel cassette lockringFor 8-speed HG chains