The shimano hg300 9 speed cassette 11 32t has 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 energy through finer cadence control the sprockets are also cut away and drilled to reduce weight without reducing rigidity also comes with a corrosion resistant steel cassette lockring for super narrow 9 speed hg chains shimano hg300 9 speed cassette 11 32t features n