Genuine Shimano replacement part

• 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