I was hoping to buy some 18" Wheels and rims for my 2013 Cruze LS. The problem is I have a very heavy stereo in my trunk at around roughly 350-400lbs. It drops my ass end around 1in or so I'd say. I was wondering if 18" rims are even a possibility with this weight in the trunk without an upgraded suspension or anything. Hoping there is a nice size gap between the tire and wheel well to keep from rubbing. Any advice would be helpful.