Goodyear G614 RST

[rohrmann]

You probably could do that. If you have 6 lug wheels, you should have 6,000 lb axles, and if that is the case, you could easily use good LT truck tires, which will have 3042 lbs capacity at 80 psi, for a lot less money, and have just as reliable a tire as the G614. There are some all steel LT tires, that are 10 ply rated, that will do what you want.