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
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