18" rim pics on Demon or Dusters
Personally, I think an 18" rim with about 4.5" of sidewall is about perfect for the rear tires of a Duster/Demon. Fills the wheel opens well, enough sidewall to not look too rubber-bandy (is that even a word?), but low profile enough to be useful.
On the other hand, I prefer a 17" on the front with about the same sidewall. An 18" makes the sidewall too short for me. Not that I don't like the look of any of the cars here, it's just where I've settled on for my car.
Not that I will have 18" wheels on the back of my car any time soon, either. I've got to settle for the set of (4) $90 17x8 GT wheels I can afford, instead of what I would prefer.