Keep in mind that daveesrt6 is referencing aftermarket wheels when he indicates the tire size: 225/35/19, Mandrus Wilhelms. And I personally like the Wilhelms he's referencing. I think it's the best-looking Mandrus rim for the Crossfire. These remind me of the ADR Propulsion wheels I saw on a Crossfire down in Florida. Car really stood out with these on it. ADR has discontinued the Propulsion and these Wilhems are the closest thing to them.

If you're wanting to use the XFire factory 19" rim, it's a 19" x 9" wheel with a +22 mm offset. Don't know if it makes a difference. I'm not one to speak confidently on this, but others can chime in with detailed information.