Hey folks.
I was luggin' around 5 girls last night in the tour and 4 in the back and one up front.. and needless to say the car was riding pretty low. None of these girls were over 120lbs but any bump was causing my tires to rub. So, I figured, "I'll be alright, it's probably only rubbing on the inside of the wheel well." But nope, the back tires actually have streaks of rubber removed. No more than 2mm wide, but about 1-3mm deep all the way around, as if the wheel rotated completely around while rubbing.

The problem is that it is in the side wall, so now I'm worried I've compromised the life of my rear tires

.
I know that I can roll my renders, and that type of thing, but should I just look into stiffer springs? I mean, I even considered lowering the car, but if I can't load it down without rubbing.. maybe I just shouldn't transport 6 people in the tour? But I gotta tell ya, when I'm driving around on my own with an empty car/empty trunk, I'm find.. but this summer, when I had a full trunk of luggage and just a passenger.. I would occationally rub.
I'm just worried about this wear on the tires if it keeps on happening.
Suggestions would be awesome, thanks!
-Jeremy
PS: less than 2 weeks before I move to Orlando.. time is flyin' now. And I have a new bumper on order.. should be ready by mid week. SO, finally, I'll have that finished.