225s on my Integra slightly rub the trailing arm. Doesn't seem to cause any problems.

I used to run 205s on the rear, but it just makes for easier tire management to run all four corners the same (old fronts go to the rear). And I had to keep a unique spare tire just for the rear. Then again, when I did run 205s in back, I never had to touch them all season...just kept flipping fronts.