We are new Trailmanor owners and have only had one short 50 mi rt so far. The owners' forum is full of great information. While researching how to find (and read) the tire manufacturing date, I found this advice:
"Light truck tires have stiffer sidewalls in order to carry heavier loads, but also are engineered for safe handling and road gripping ability. Trailer tires, on the other hand, are designed to give a soft ride and to slide sideways or scrub the road while cornering. Because of these differences, never put light truck tires on a trailer. Some people think that if the tire is good enough for a truck it must be good enough for a trailer, but this is a fallacy. Light truck tires are not engineered for the unique stresses of trailering."
Here's the link:
http://www.newrver.com/publish/readtires.shtml