Shimano 11 speed deore xt m8000 cassette ride anywhere with smooth and precise gear changes improved driving efficiency and stable shifting shave bike weight off without sacrificing durability or reliability shimano 11 speed deore xt m8000 cassette a high performance cassette with contoured shift gates resulting in a crisp smooth shift even under load the close ratio of the gearing allows you to be more efficient with your energy with a greater control of your cadence shimano have mounted