Rich - You need to air those tires down to 9 psi! Or do you already have them aired down? /w3tcompact/icons/smile.gif
Mine support 50% ballast, and 2,000 lbs. of backhoe at 9 psi, no sweat. If Michelin allowed it, I'd lower them to 7 or 8 when I wasn't using the backhoe.
Mark