TheShimanoTiagraHG500 Cassette 10-speed12-28Tis perfect for the budget minded rider who still wants a high level of performance and reliability. Featuringhyperglidetechnology thehyperglidesprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. The sprockets on this mountain bikecasseteare cut away and drilled to reduce weight without reducing rigidity and the nickel-plated finish offers hard wearing resistance to corrosion. ShimanoTiagraHG Cassette Features High quality 10-speed cassette Hyperglidesprockets Sprockets are cut away and drilled Nickel-plated finish Corrosion-resistant steel cassettelockring