Shimano's Altus 7-speed cassette with Hyperglide technology has a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load. Corrosion-resistant steel cassette lockring. For 8 speed IG/HG chains.. 7-speed: 12-14-16-18-21-24-28T
. Shimano Series: Altus M2000
. Hyperglide sprockets guide chain for quick, direct and quiet changes
. Compatible chain: IG/HG
. Colour: Black