The shimano hg41 8 speed cassette is a good performance 8 speed cassette hyperglide sprockets have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load the sprockets are cut away and drilled to further reduce weight without reducing rigidity a chrome plated finish offers hard wearing resistance to corrosion also comes with a chrome plated steel cassette lockring designed for 8 speed hg chains