Bluebird, it appears I was incorrect. I've actually got 215/65R15's on. No rubbing issues anywhere on the car, but I think that's the standard 15" tire.

Thanks for the input folks. The 10:1 final drive ratio is what I read about for Chevy's, just wanted to make sure it applied to Pontiac's also. I figured it was a pretty universal thing, but I'm learning as I go along.