Well over 50,000 miles on original bearings in 5 years.. Pull them off and check every other year, in between use the grease fitting on the hub per dexter axle manual. I did replace the brakes last year, only because a puppy chewed the wires off flush to the backing plate! The original brakes had some life left on the shoes, but the magnets were about shot (groves and uneven). It was cheaper and easier to replace the whole assembly as Farmboy666 mentioned. I do carry a extra set of bearings and seals with me, habit left over from boat trailer experiences years ago.
