Since I have put my PSS9s in the car and new tires I have noticed a ton of black rubber on the inside lining of my wheel wells. I am wondering if maybe the car is too low right now and the tires are scraping the wheels wells in turns. Looking at the car parked there is about a finger lengths clearance. Has anyone experienced the same thing?

 

A thin spacer might help here. It would also improve the oversteer.

 

normal...must show more on white though...spinning the wheels will do that LOL

 

A sudden increase of rubber at the wheel well and the rear bumper could indicate the bottom of the compound of the tread is peeling off and the tires are starting to show cord. If tread wear looks good, and the tires were scraping the wells, you should feel it, especially in harder turns. If it is subtle, take pyrometer readings in the outer middle and inner zones immediately after running hard to see if it is rubbing. Otherwise I agree with Cary.