NO where on a tire does it state strength.
Again you are confusion Max Load Capacity with strength. That is the problem with lightly built ST tires. They have a high load capacity and not the beef to live up to there inflated ratings. I use to debate this issue with Fasteagle all the time.
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=195Strength plays into the capablity to be a load range C, D, E, or G etc tire with the assossciated higher inflation pressure.
Have you ever heard a car or light truck manufacturer state that one of their tires looses 10 percent of its load capacity per year? Chris