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With its Beam Spider construction, the new Shimano Deore M6100 12-speed cassette shaves weight while increasing Shimano's MTB gearing range another gear. Using Shimano's new Micro Spline freehub body and Hyperglide+ tooth profile, the 10-51T cassette delivers advanced shifting performance.Deore M6100 12-Speed Micro Spline MTB cassette featuring light weight minimal design sprocket carrierHyperglide 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