2 separate blow outs on I-75 S/B in Georgia (Fifth Wheel)

The Marathon is actually know as the Marabomb, not a good tire to be on a heavy trailer. A lot of us have went with a G rated tire, I am running the Geostar 574 found on Ebay for a great price, also another good tire is the Goodyear 614. Your rims should be rated for the 110 psi rating for these tires, check on the back side of your rims on one of the spokes, it is stamped there...