I have a '99 Maxima with approx. 157,500 miles. I bought 4 new tires in May (I have put 12,000 miles on these new tires) and the back tires have worn down so bad that I doubt I will get another 5,000 out of them. I was told that my struts were badly worn and that I should replace all of them if I plan to keep my car. HELP!