This is the last Shimano XT front hub for rim brakes, then replaced with the identical, but disc compatible HB-M775.
Contrary to popular belief, these are the best sealed and bombproof hubs made by Shimano. Only XT and XTR hubs at the time have thicker but aluminium axles.
Hub includes ball bearings, but these are encased in a plastic cage – not to be mistaken for caged bearings.
