High quality 9-speed cassette for Capreo groupsetHyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadClose ratio gearing allows a more efficient use of energy through finer cadence controlSprockets are cut away and drilled to reduce weight without reducing rigidityPearl-bright finish offers hard wearing resistance to corrosionPearl-bright steel cassette lockringFor Super Narrow 9-speed HG chains