Shimano CS-M4100 Deore 10-speed cassette, 11-42T

From Shimano:

• Deore M4100 10-Speed Dyna-Sys cassette featuring light weight minimal design
• 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 and drilled to reduce weight without reducing rigidity
• For 10-speed HG-X MTB chains