High quality 7-speed ATB cassette. IG sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth up-shifts and down-shifts. 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. Pearl-bright finish offers hard wearing resistance to corrosion. Pearl-bright steel cassette lockring. For 7-speed IG chains.