Changing From 14" to 15" Tires and Rims

Thanks for the replies and advice. As I started looking at tire sizes and clearance, I ran across an article on etrailer that mentions 3" is minimum clearance at the wheel well and I am at 2.8" with the 14" tires so without a lift, bigger tires are out. I thought the extra half inch was no big deal, but it would just cut too close. I've seen the axle flip method of lift, and while cheap and well within my capabilities, 4 or 5 inches is WAY more lift than I need or want. I did find an affordable alignment kit that raises the trailer two inches (link at bottom)which is the amount of lift I want, but my tires wear evenly now and I hate to mess with an alignment kit. Not sure what to do at this point, but I need tires soon, so I need to make a decision.

http://www.pplmotorhomes.com/parts/rv-wheel-covers/axle-alignment-kits.htm