OK, So you will need more offset for the rear wheels.
I started to look for 15" but gave up when I soon realized custom was the only way to find something that would fit without spacers and still look good. When I started to price custom wheels and tires it became obvious larger rims were not that much more to get in a custom sizes and the available tires in 15" vs 17" finding tires for 17" wheels were far more abundant, superior in tread design, speed, heat and tread wear ratings for almost the same cost. Knowing someday (and I have at this point) I would be going to bigger brakes I went with 17". The goal being my car would be safe at modern highway speeds and the way today's drivers drive like they don't know they are driving at all. Just food for thought.
