Shimano 105 11-Speed Cassette, Various - CS-R7000High performance HG EV 11 speed 105 Road cassette Hyperglide EV 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 and drilled to further reduce weight without