Wheel bearings

jfkmk and proxim2020, sorry I don't know how to multi quote so this will have to do:h. I can assure you that there is no magic behind a "permanently sealed" bearing. They use the same type of single lip seal that our trailers use. And that "lifetime supply" of grease that was mentioned? There is no special reservoir that supplies grease for the life of the bearing, I bet that most well packed trailer hubs have more grease than in the permanently sealed version. Our trailer hubs can be sealed just as good as a permanently sealed hub, It just takes a properly installed seal and some anaerobic sealer around the bearing cap. Permanently sealed and greased for life are nothing but marketing BS covering up for the lack of grease fittings or to make something sound better. Serviceable is always better! Take U-joints and front end components for example. The only difference between the two versions is the grease fitting. The seals and everything else is the same except in the non greasable version you got screwed out of a grease fitting. There is a company out there that makes a product marketed toward boaters that is interesting, it is a clear cap that presses into the hub and sealed with a sealer. The cap has a drain/fill hole in it, what you do is clean or replace the bearings and clean out the hub then fill up to the line (about half full)with 80W90 gear lube.