Just an observation BUT ... surely by now the RV industry could be using bearings that don't need any servicing at all, just as the automotive industry does. Sure, any car / truck bearing could fail but it's pretty rare, I've had but one bearing fail on all the vehicles I've ever owned for the last 50 years, and when it did fail it wasn't a matter of life or death, replace it now or else. It just got noisy so the service manager said to just bring the truck in at my convenience, in the meantime I could continue to drive it, no biggie ... so why are we still dealing with this nonsense with our trailers? Good grief, is it not time we can have tires that don't blow up at a moment's notice for no apparent reason and bearings that don't fail during the lifetime of the trailer?! :M