Shimano CS-5800 105 11 Speed Cassette – Silver – 12-25.

Key Features:

• 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
• Close ratio gearing allows more efficient use of energy through finer cadence control
• The 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