Featuring Beam Spider construction, the latest Shimano Deore M6100 12-speed cassette reduces weight and expands Shimano's MTB gearing range by adding an extra gear. Utilizing Shimano's Micro Spline freehub body and Hyperglide+ tooth profile, this 10-51T cassette offers superior shifting performance. 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 Features: Deore M6100 12-Speed Micro Spline MTB cassette featuring light weight minimal design sprocket carrier Sprockets are cut away and drilled to reduce weight without reducing rigidity MS Freehub For use with 12-speed MTB chains Average weight: 534 g for 10-51T