I would have to agree with Pascal, the whole aftermarket wheel thing is BS. My car has had the 17" stock wheels on it it's entire life. My Mustang has 32,XXX miles on it and I just took it to the shop today, because it wasn't riding smoothly and they told me my ball joints are bad. From what i understand, this is a common problem with our cars. BTW mine is an 05. I have ordered the ball joints from NAPA and will be fixing the problem this weekend.