I'd go with the weight of the load compaired to the rating on the tires, and keeping an eye on the overloads. You don't need a blowout from being overloaded.
Keep this in mind...just because these trucks can move it, doesn't mean its safe to do so. If you are overloaded and have an accident, you may be left in the wind.
Keep this in mind...just because these trucks can move it, doesn't mean its safe to do so. If you are overloaded and have an accident, you may be left in the wind.