Thanks for the replies. I am still a bit confused on why both tires, originals about 10000 on both, look really great. The other side has had some problems. One tire has only about 3000 on it and is starting to show wear on the inside tread. I blew the other tire coming back from Montana\. This side has both pop outs. I carry all of my drinks under the seats, about 50-60 pounds. I doubt the axles could be a problem, could be wrong, on a unit with only about 9000 miles on it. I travel in high wind areas and tend to keep my tanks full for stability purposes, not a great idea? Thanks