High quality Mega-9 gearing with close ratio sprockets and Hyperglide design for efficient shiftingFeatures:• High performance 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• Six largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity• Sprockets are cut away and drilled to further reduce weight without reducing rigidity• Chrome-plated finish offers hard wearing resistance to corrosion• Chrome-plated steel cassette lockring• For Super Narrow 9-speed HG chains• Weight 256 g for 11 - 32T