- High quality 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 - Nickel-plated finish offers hard wearing resistance to corrosion - Corrosion-resistant steel cassette lockring - For Super Narrow 9-speed HG chains - Weight: 335 grams for 11 - 32T