TheShimano 10 Speed Cassette CS-HG500-10 offers:

• Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load
• Sprockets are cut away and drilled to reduce weight without reducing rigidity
• Nickel-plated finish offers hard wearing resistance to corrosion
• Corrosion-resistant steel cassette lockring
• For 10-speed road HG chains