I've read a lot of comments from people on this site about tire cupping issues. I guess I thought the problem was resolved with the Service Bulletin in 2004. I've got a 2005, and I have 30,000 miles on the tires. I've been experiencing tire cupping, and have had them rotated, which made little difference. The noise is annoying. I spoke to Ford when I had the truck in for the 30,000 mile check up and they looked at me like I was crazy saying they had never heard of a tire cupping issue. I'm at the point now where I'm trying to decide if I want to buy new tires and see if it fixes the problem. I don't want to have this problem continue with a new set of tires, and I'd like to know what I can expect down the road as far as replacement components other than tires to resolve this issue. If it is going to be more than I want to deal with, then I'll just make a change in vehicles. Thanks for your input.