Shimano, XT BB-MT800, Hollowtech II, BB Shell: 68/73mm, Steel Black, IBBMT800B
Shimano BB-MT800, XT 8000 series Hollowtech II bottom bracket, IBBMT800B, for MTB cranks
BSA, 68/E/73mm BB shell
24mm spindle, Steel bearings, Black
Compatible with all mountain Hollowtech II cranks