A few weeks ago I had to put the spare on due to the fact that the flat was caused by a rim weld leaking. Now, having gotten back home, I have another tire with a leaking rim. Has anyone else had this problem? Is this covered by the factory? I am thinking I'll need to change all 4. Is there a recommended type? We purchased our '05 Golden Gate in Nov '04, took possession in April '05. Spent the summer in a nearby park and finally hit the road October '05. That will give you an idea of how much traveling we've done. I doubt the problem was caused by overuse. We are not overloaded. Any help would be appreciated.