Quote Originally Posted by matt5112 View Post
225's belong on 7" or 7.5" max.

For an 8 you should be around 235-255.
The 05-07 STi's stock wheel width is 8" and the stock tire size is 225/45/17. I'd say he's fine running a 225 if Subaru Technica International puts tires that size on their cars.

I'm running 225/45's on both of my 17x8 sets of wheels. Thought about getting 245's just for the look but have no reason to.