RobertCTS said:
The proportions with an 18" wheel look good IMO. I had given thought to 19" but the wheel & Tire choices were much less.
I think 18's are great, but they serve a different function as the 20's. DUB's give the CTS "pimp status" and helps it put 300C's to shame when you pull up to the line with a 2.7L with 22's.
However, 18's are great when you are after performance and an incognito sort of look. In fact, I am in the market for a real lightweight set of 18's. I want to go with a 5 or 7 spoke rim in gunsmoke.
I think that in terms of performance, 18's are the way to go. But 20's definetly look the nicest.