Originally Posted by IBLUBYU
My "guess" is that the 45 profiles should mount in the back, to make up for the 18 inch wheel instead of the 19 incher, and fill in the wheel well better, cosmetically speaking.
Yep, that's what I would do.
Actually there's such a small difference that I'd use whichever set had the best tread in the rear. Straight 18's don't have that "sexy" look on these cars (IMO). Might as well just slum it with the snows.