Whew thats a lot of info. Now just for kicks and giggles, the Trailer King website lists my tire as have a 2860lb capacity at 80 PSI. For single axle. Thats their E rated ST 225 75 R 15. I didnt say TK recommended 50 PSI. My question was really centered on whether there was any QC at the plant that made sure tires ready to put on a Cat trailer are properly inflated? And again, after being posted on here for a decade or longer to max air pressure in an ST tire has BC come out with new guidelines for their trailers? Just thinking that on a single axle trailer, having only a little more than half of the max pressure of the air in the tire, it could cause premature wear not only on tires but other components as well.