Premium, 11 speed double chainset, the Shimano M8000 Deore XT Crankset uses the most advanced 11 speed Dyna-Sys chainrings for excellent shifting performance. With forged, Hollow Tech II aluminium construction, the M8000 Deore XT Crank offers unrivalled strength-to-weight ratios & is compatible with external bottom bracket bearings for increase efficiency & ease of maintenance.