80 PSI on Aluminum Wheels
I'm running 225/75/15 D rated tires on aluminum rims inflated to 65 psi. The only GY Endurance tires I find this size are E rated inflated to 80 psi. I do not know anything about these rims other than...
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ktmrfs wrote:Seriously? You can't figure out why that is?
so, I guess I'm way overinflating my truck tires and GM doesn't know how to read a chart.
10,000GVWR, 7200lbs unloaded
rear inflation at max load 75psi=3100lbs x2 =6200lbs
front inflation at max load 60 psi=2760 x 2= 5520 lbs
total is 11,720, 1720lbs OVER Max GVW. almost 20 percent over GVWR
You can load a vehicle unevenly. That's why there are separate front and rear ratings, which can combine to be more than the gross rating.
Load a bunch of stuff in the back so you hit the rear rating, and you'll then hit the gross rating before you hit the front one. You're not supposed to exceed any of the ratings, and the tires are spec'd to support any allowable axle load.
