i found running low in the front with tires this size i had rubbing on the firewall under turning and big bumps (the pinch chewed the crap outa the tires!)...had to give the firewall wheel wells a light massage with a sledge hammer and it was fine
i was running 17's with 40 profile wound down past the bumps stops (they were removed) was tucking probly 1/2 inch to 1 inch havnt got a shot of how it was tucking so i photo choped this pretty much the same