Shimano 105 5700 road cassette has hyperglide sprockets with a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. The close ratio gearing allows a more efficient use of energy through finer cadence control. The largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity and sprockets are cut away and drilled to further reduce weight without reducing rigidity. These cassettes are of a Nickel-plated finish and offer hard wearing resistance to corrosion. They come with a Pearl-bright steel cassette lockring and are suitable for all Super Narrow 10-speed HG chains