Key Features:Great value 9-speed 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 energy through finer cadence control,Sprockets are cut away and drilled to reduce weight without reducing rigidity,Corrosion-resistant steel cassette lockring,For Super Narrow 9-speed HG chains. - Manufacturers part numbers: Shimano_CSHG2019132|ECSHG2019132
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