Sid - If your tires are the original tires, and you have a 2006 shell, the tires are probably dated somewhere in 2005. The production date is molded into the sidewall, a couple of inches above the bead. The stamp begins with the letters DOT, and the important numbers are the last four. They are the week and year of production. For instance, 2205 would be a tire produced in the 22nd week of 2005. Unfortunately, the date stamp is only on one side of each tire, and quite often, the stamp is on the inside.
Ken
Ken Robertson
Parliament Motor Coach - 727-748-5986