Cassette Shimano CS-HG50 8-speed

High quality 8-speed cassette 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 Sprockets are cut away to further reduce weight without reducing rigidity Nickel-plated finish offers hard wearing resistance to corrosion Corrosion-resistant steel cassette lockring For Cassette Cogs: 12-13-15-17-19-21-23-25 Drivetrain Speeds: 8 Weight: 323 g