Rim width question

[Manny1117]

How will difference in rim width affect handling, ride comfort and car specs (like actual speed)?
What I mean is that, if I got 225/40R18 for an 01GAGT what difference will an 18 x 8 rim make compared to an 18 x 7 rim.

[DontPassTheFence]

A wider rim on the drive tires is always better :D But if you go too large, you may rub the fender wells. (I rub at full steering wheel lock with stock 16'' rims but with a larger tire size mounted - 215/55R16. But then again, I have a 97 GA