KMC 18" with a 235/45/18 and for some reason both front and rear seems to need camber adjustment? Is this just me because I can already tell its wearing on the inside after about 100 miles. I'm not sure of the offset on these but they came off a 3000GT.

 

On stock suspension? Can't think of any reason just adding new wheels & tires would cause any problems. If they weren't seated right, or out of balance, you would notice that while driving. If you haven't altered your suspension at all I can't think of anything. The tires arent' rubbing on anything are they?