The Shimano MT800 Press-Fit Bottom Bracket is designed to work with the 24 mm spindles found on Hollow Tech II cranks like the Deore XT M8000. It borrows the smaller bearing design from the XTR and Dura Ace bottom brackets for less drag and better sealing.
Compatible with 89.5 mm - 92 mm width press-fit bottom bracket shells with 41 mm inner diameters. Spacers included.
A guide to bottom bracket standards.