As the title states, I've been having a hell of a time with inner tire wear. After 2 sets of rear tires on my 07 Grand Prix (GT), I took the car into the dealership for an alignment. That was about six months ago. As soon as the car was aligned, I bought new tires and had them installed. Just yesterday I noted wear still on the inside edge. Since the car is newer, I am skeptic of worn out springs or struts, but at this point I'm tired of wasting money on tires every 8 months. I've owned the car for a little over 2 years now. Any ideas?

Thanks,

Camrin