11 month up-date. I bought 2 new Cooper ZEON RS3 G1 yesterday. The factory size of 235/50-18. Now, all 4 tires are back to the factory size. With 3,500 miles since January, I had them put the new tires on the front and the old tires on the rear. I asked them if the older tires were wearing straight and even, they said yes. I checked with my tire tread wear gauge when I got home and sure enough, the tread wear was even, on both tires. I must have the camber right Very little over all wear from the new tires compared to the older tires. I don't get over 15,000 to 19,000 miles on 'all season' tires where I live because of the curvy roads. I'm happy to say my camber problem is fixed.................................... Thanks for the help and suggestions......................