The Shimano Tiagra HG500 Cassette Sprocket 10-speed 11-28T is perfect for the budget minded rider who still wants a high level of performance and reliability. The wide range of 11-28T sprockets offer a large gear range to make even the toughest climbs easier. Featuring Hyperglide sprocket technology the sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. The sprockets on this mountain bike cassette are cut away and drilled to reduce weight without reducing rigidity and the nickel-plated finish offers hard wearing resistance to corrosion.