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.
would you mind adding a "Winter recommendations" portion to the initial post so this info can be included:
nice to know info that everyone could benefit from.