Exactly...what's 10mm's? Local Discount Tire Man ***Tech Note***The stiffer the sidewall, the more issues that could arise. H-rated...no biggie...Z(sub Y-W)-rated...you could actually start to split the shoulder/sidewall area of the tire! tataTechnically speaking, 235's will fit on a 7 inch wide wheel, but it's not safe and not recommended. Stick with 215's or 225's.