My car is an E0 SVT. I too bought the Kumho 712 225-50R16s. The tires I had before were 205-55R16 BF Goodrich KDWS tires. I found that I have to put 40PSI in the Kumhos to make them stick. I have kept them there for a few months and I have no abnormal tire wear. Also no rubbing issues. The Kumhos have EXCELLENT wet traction, better than I have ever experienced, although my experience is somewhat limited to bigger tires on a race Monte Carlo. I do believe that the BF Goodrich tires I had to start with stuck to the road better with only 35PSI. I never aired them up past there. Hope this helps!
