Shimano CS-R7000 105 11 Speed 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 reducing rigidity
• Nickel-plated finish offers hard wearing resistance to corrosion
• Pearl-bright steel cassette lockring
• For Super Narrow 11-speed HG-X chains