I have the potenza as well, and I am predicting in around 12000 or so, they are wearing down rather quick. BTW, could anyone of you with Potenza peel off in first gear on a straight line acceleration? Last night I was just testing to have some fun, so I step on it after turning off the traction control and to my surprise the tire peeled for about 1 sec or so. Is it my tire wearing down and losing traction or does IS have enough power to do this?