I have slight tire feathering on 2 newer tires that the previous owner put on this truck. The back 2 are feathered as well, alot worse. I doubt they were ever rotated. All 4 are Continental ContiTracs. Has anyone else had feathering issues with these? I read on Tire Rack's site in the reviews that a lot of people were not happy, but did not see why really. Thanks!