The rear tires on my 2004. 5 dually are warning fast. The front tires are doing great. I have 23,000 on the truck of which 14,000 were pulling my 13,000 pound 5th wheel. I suspect they will not last beyond 30,000 miles. Anyone have any ideas as to what tires would be good replacement? I don't think I want to go back to Generals.