I guess I'm confused by what you mean. All most all tires are sized metric these days. Like I have 233-55-r16 on my truck, that is on 8 inch wide wheels.s10rz350 said:will a shop put 7.5 or 8" tires on my 7" rims? Also how do I figure out what size tires to get? At TireRack.com I became confused rather quickly when I checked out their chart etc... Help?