Shimano HG51 8 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 to further reduce weight without reducing rigidity 

Nickel-plated finish offers hard wearing resistance to corrosion

Corrosion-resistant steel cassette lockring

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