Originally Posted by Rutchard
changing the wheel width can effect the overall diameter of the tire, even if the tires are the same size. Might only be off by a little bit, but center diffs aren't exactly cheap.
Keep the wheel width/size and tire size the same on all 4 corners.
Even if you are *that* much of a nervous nelly about it (it would be fine, really) you can still run different offset wheels for a deeper lip in the rear.