I really could not afford purchasing all new rims at this time, but will look at the 225s at a higher load rating. There are two slide on the left side but never had an issue with the left side tires. I definitely heard the right rear blow this last time. I agree the weight seems low for a trailer that size, I took it to the scales when I first bought, loaded for our first trip. I haven't taken it lately but the weight was all in range of the truck. I might still have the paperwork and will post the weights. Again, we go on many trips a year and only happens on the way back from the beach...we have way less weight than going and the holding tanks are always empty before heading out.