High quality 8-speed cassetteHyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadMegaRange gearing gives a super-low 40T 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