An exciting addition for Deore XT M8000 is a 1x11 specific 11-42T cassette that expands Shimano's 1x11 gear range slightly over the race inspired 11-40T of XTR. Featuring Rhythm Step progression the Deore M8000 maintains calculated, shock-free gear steps from one gear to the next. The implementation of this allows you to conserve energy as well as keeping up your speed and rhythm on the trail. Combined with a premium 11-speed chain featuring HG-X11 asymmetric plate design and SIL-TEC surface treatment, the Deore XT M8000 results in superior mountain biking performance.High performance 11-speed Dyna-Sys II cassetteHyperglide 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 controlLargest sprockets are mounted on lightweight alloy carriers to reduce weight and increase rigiditySprockets are cut away and drilled to further reduc