Yeah, it's possible to get a lower rated tire in your size. I actually caught a dealer trying to do that to me when I was buying a used Duramax. They had tires rated for roughly 2000#/ea on it when the axle was rated around 6000#. I told that story to a tire shop and the guy made it sound like it was illegal (for lack of a better term) to do that. After that I always look at the rating before they install them to be sure. I also always check date codes. I ordered some tires off Walmart.com and they were over 12 months old.... took them back.