Shimano Shimano XT MT800 68/73 integrated bottom bracket

Shimano XT Hollowtech II BB-MT800 bottom bracket for XT FC-M8000cranksets. The all-new DEORE XT FC-M8000 cranks turn on an updated HOLLOWTECH II press fit (BB-MT800-PA) or threaded (MT800) bottom bracket. Using smaller, lighter bearings and a seal system proven on both XTR and road groups, the new bottom bracket reduces weight and bearing drag while improving mud durability. In short, less weight and increased rotational efficiency results in a faster DEORE XT ride. Made in Japan.