The high performance shimano 105 5700 10 speed cassette is designed for road bikes it features hyperglide sprockets which have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load this road cassette has close ratio gearing which allows for 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