High 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. Key Features - 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 reducing rigidity - Nickel-plated finish offers hard wearing resistance to corrosion - Pearl-bright steel cassette lockring - For Super Narrow 11-speed HG-X chains