I just replaced two sets of wheel bearings after 10,000 miles on my Keystone Alpine, 2012. I had about 6000 miles on it before my last trip and while preparing for that trip I checked all wheels. I ...
We have put about 60K on our 5ver, purchased 4 years old at the time. I did the bearings right away, and while they had grease, it was rather skimpy. Ever since have done them ever 10-15K, still with original bearings. Each time I plan on replacing them, check them for looseness and put them back in.