The Shimano 105 R7000 11 speed 11-30T Cassette is a high-performance HG-EV 11-speed 105 Road cassette.Shimano 105 R7000 11 speed 11-30T CassetteHyperglide EV 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 resistance to corrosionPearl-bright steel cassette lockringFor Super Narrow 11-speed HG-X chains
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