The Shimano CSHG51 8Speed Mountain Bike Cassette features Hyperglide Technology for precise smooth shifting and is designed for trekking and MTB use The sprockets are cut away and drilled to further reduce weight without reducing rigidity A chromeplated finish offers hard wearing resistance to corrosion Close ratio gearing allows more efficient use of energy through finer cadence control Key Features 1132T 1113151821242832T 1130T 1113151720232630T Steel spockets and lock ring Chrome Plated HGIG 8speed chain compatible

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