There isn't any difference because the sidewall height is the same on a 255/35 as compared to the 295/30's...........if that makes sense. The "30" and "35" numbers are the aspect ratio and just represent the tire height to width(or vise versa) ratio. The OD is near identical. Eventually I will take them off and have the stock rims widened to 10 or 10 1/2'' so that I can have a better contact patch with these tires and/or move up to some 305's.