High quality 9-speed cassette for Capreo groupset 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 energy through finer cadence control Sprockets are cut away & drilled to reduce weight without reducing rigidity Pearl-bright finish offers hard wearing resistance to corrosion Pearl-bright steel cassette lockring For Super Narrow 9-speed HG chains