Its one of those deals where if you get it right, your good and if not you're trying to sell a brand new set of wheels because they don't fit. I need to put a 9" slick on my Aspen. 8" rim but the backspace that I calculated is off. Measured and thought that a 4 1/2" backspace would be right. Borrowed a Weld wheel from a friend and its right on the leaf spring and inner tub. Anyone solve this problem?