I haven’t taken off the bearing buddy or checked the bearings since I bought the boat 2+ years ago (and the previous owner did not do any maintenance) so I suspect these bearings are 5+ years old and have thousands of kms on them! They never get hot on long trips and I did replace the bearings on the other axel but these bearing buddies are rusted on and whacks with a mallet only deformed them. Got them soaking in liquid wrench and will try to pop them off later today and post what I see inside! ..also I haven’t greased them since I’ve owned the trailer so this should be interesting… venture trailer.