Am going to be needing some tires soon. Have a '02 Super Duty CC Diesel 250.Pull gooseneck occasionaly, but mostly just normal driving. When I had it in for service, the service tech told me next time you need tires, be sure you get an 8 or 10 ply tire. I don't remember at the moment what is on the truck at the present time. Thanks in advance, Trisha.