ok, now I've asked this a number of times, and gotten great answers but why do tire shops say that a 255/30/22 is the way to go? besides the fact that is pretty close to the stock diameter of the 17's, but many of you on here run a 265/35/22? I looked on Discount Tire's website on a tire calculator thing and compared the height and size difference between the two and it is pretty far out, looks to me that the 255/30/22 may be the route I'll take. I'm not here to bash anyone using the 35 series, just trying to find out what to do before I drop some cash on wheels. I want my speedo to stay relatively close to what is is now and want to keep getting good mileage. whats your opinons on this topic?