Shimano 105 quality features a new design for a smooth and quiet drivetrain key features high performance 10 speed 105 road cassette hyperglide sprockets 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 largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity sprockets are cut away a