High performance 10 speed 105 road cassettehyperglide 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 reducing rigiditynickel plated finish offers hard wearing res