The Shimano CS-6600 Ultegra 10-speed cassette 14 - 25T is ahigh performance 10-speed Road cassette

Key Features:

• Hyperglide 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
• Three 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
• Chrome-plated steel cassette lockring
• For Super Narrow 10-speed HG chains
• Weight: 235 g for 11 - 23T