JIMNLIN wrote:
Older 14" Marathons (others brands also) came in a load range B at 35 psi which was basically a P tire.
With a 6k gross weight divided by 4 tires = 1500 lbs per tire requirement. Subtract 500-600 lbs hitch weight leaves 1375 lbs on the axles. A ST205/75-14 C at 50 psi and 1760 lbs of capacity would be a good choice for a tire when replacement time comes.
Good info, Jimlin. Definitely a good time to upgrade tires to C or even D rated tires.
Keep in mind, you will likely have all rubber tire stems, which when new are still only good for 50-60 psi. They are only a couple of bucks over at etrailer.com. You will have the smaller diameter hole, the larger diameter are for some truck rims ;)
Here are the ones I put on last summer.
Americana Valve StemsNo more slow leaks and good up to 100 psi!