Robert, thanks for this help. I have a 46 Bantam TC3 trailer, has original axle, but the previous owner put standard 15 inch trailer wheels on and a p235/75/15 tire. Depending on the load, the tire will sometimes rub on the tub of the trailer. I would like to purchase 3 new wheels and tires, looking at these summitracing.com/parts/wvi-12-5612358. What specific size/specs do you recommend. 15x6? Does offset and backspacing matter? I would like to avoid the rub, trying to get more back to original look. Thanks in advance. New to this trailer, and not the most mechanically minded guy. The previous owner had done great work, I just need to add a spare, and get new tires, figured I'd swap out all wheels hoping to fix the potential rub.