Deore M6100 12-Speed Micro Spline MTB cassette featuring light weight minimal design sprocket carrierKey Features:Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadClose ratio gearing allows a more efficient use of energy through finer cadence controlSprockets are cut away and drilled to reduce weight without reducing rigidityFor use with 12-speed MTB chainsAverage weight: 534 g for 10-51T