Shimano CS-HG400 Alivio 9-Speed Cassette 11-34 Teeth.

• 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
• Gear ratios to suit all wheel sizes 26/27.5/29inch
• 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 Super Narrow 9-speed HG chains