High performance Shimano 105 5700 10 Speed Cassette for road bikes. Featuring Hyperglide sprockets which 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. The largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity, and the sprockets are also cut away and drilled to further reduce weight without reducing rigidity. Complete with a Nickel-plated finish offering hard wearing resistance to corrosion and a Pearl-bright steel cassette lockring. Compatible with super narrow 10 Speed HG chains.