225/40/18 I'd go with 235/40/18 if your dropped on springs. i have wheel gaps which bothers me when i look at my car sometimes
its funny about my car and some other lgt out there. one side is higher than the other on my car so the driver side rear rubs even with fender roll but the passenger side rarely or doesnt even rub at all. i have to shave down a little part on the driver/rear but thats it. you should be fine with fender roll and some camber.