Shimano 105 5700 10sp cassette chain bundlehigh performance 10 speed 105 road cassette featureshyperglide sprockets have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under loadclose ratio gearing allows a more efficient use of energy through finer cadence controllargest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigiditysprockets are cut away and drilled to further reduce weight without reduc