~ High-quality 10-speed cassette ~ 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 ~ +/- 390g
