bucky wrote:
If you go to the E's don't run them at 80 PSI. They'll beat the trailer up.
Have you ever weighed your trailer as loaded? Go from there.
Yes, weigh the trailer. Just because the sticker says 7200lb, doesn't mean that's reality.
Did the tire shop suggest any source for the blowout? If you picked up a screw, tire quality may be a red herring.
Assuming you are below 8000lb (actually more like 9000lb when you factor in the hitch weight), either tire has enough load capacity.
PS: They don't add plys to make tires stronger anymore. So if you cut open the new tire, you won't be able to count up 8 plys. Just go off the load rating.