The shimano hg41 7 speed cassette 11 28t this cassette is a durable hyperglide cassette with smooth shifting for use with 7 speed hg chains shimano hg41 7 speed cassette 11 28t features durable 7 speed atb cassette hyperglide sprockets have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load close ratio gearing allows a more efficient use of energythrough finer cadence control sprockets are cut away to reduce weight