I just bought a 2008 StarCraft camper and I inspected the tires when I bought it and they looked good. There was plenty of thread and no dry rot cracks. We took the camper for a night this weekend to test it out. The camp ground was 45 miles away. When we returned, I found that about a 9" section of tire thread was gone and the nylon cord reinforcing was shredding. I took the tire to a local tire store and the salesman showed me the date code. The tire was one of the original tires and it was made in 2008. He said that is all of my tires are 10 years old, they are to old and not safe. They could only special order the tire I need and the installed price was $85. I told them no thanks. I ordered two 12-5.30 Kenda tires with the rims for $107 total. The date code is a 4 number code molded into the tire near the rim. The last two numbers is the year is was manufactured. In my case, it said 08.