The original tires on our 2006 model year 30' Classic (build date in late 2005) were Goodyear Marathon ST225/75R15 LRD tires with a date code of xx04 (I don't remember the week).
Since we are the third owner, I do not have an accurate number on the tire milage. However, based on conversations with the second owner, I estimate the milage to be around 5,000 miles.
The tred on all four tires appeared to have essentially no wear. There were no signs of cracks of any sort on the sidewalls of any of the tires.
I discussed tires with AS, and found out that they are still installing the above tire during manufacturing. My local Goodyear dealer checked with his supplier and stated that these tires are currently being manufactured in the USA.
We have elected to continue with the Goodyear brand, and had four of the Goodyear Marathon ST225/75R15 LRD tires installed today. The original tires were run at 65 psig, and we will continue to run 65 psig.
F. A. Meloy