are you running the 315's on the stock wheel? any rubbing?
How many miles did they last and what kind of driving do you do?
ie:dragging, DD, etc....
Honestly I burn up my tires bad. This is a DD car but multiple street races and drag passes on these street tires and they held up pretty well. With all the abuse I put them through they lasted about 20K miles. About $115 a tire for 255/40/17