Change tire size?

Thanks everyone for all the replies. I am ordering a set of Maxxis 215/75/14's to go on the trailer. Thats stepping up one size in the 14" wheel giving me a little more capacity. The axles were replaced about 18 months ago, I really don't think they are bent, I could be wrong. There is no one anywhere around me that does alignment, my only option is to order new axles. I think I will try my next trip, aprox 1500 miles on the new tires. If they are showing wear I will look for a shop that can check them where I will be camping. As with all my new tires the shop I use to install them balances and fills them with nitrogen. I hope to upgrade to a new camper in the first part of next year and you can bet I will do a very detailed inspection of the axles and tires that will be on the new trailer.