You're already on the verge of rubbing with a 215/40 17, imo. A 225/45 17 is wider AND taller making your chances even higher. It will also effictively make your gearing taller making you slower off the line, although decreasing rpm's during highway cruising.
Mugenlude:
would you mind adding a "Winter recommendations" portion to the initial post so this info can be included:
http://preludeonline.com/showthread....hreadid=149799
nice to know info that everyone could benefit from.