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 to further reduce weight without reducing rigidity
• Nickel-plated finish offers hard wearing resistance to corrosion
• Corrosion-resistant steel cassette lockring
• For Narrow 8-speed HG chains