Tire Pressure for G Rated Tires
My 2016 Montana High Country came with ST 235/80R/16 E tires rated for a max load of 3,420 pounds at 80 psi. The selling dealer upgraded the tires to Goodyear G614s 235/85R/16 G rated for a max load ...
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If I calculate it with my determined extra save formula, I will come to 101 psi advice .
Then I assume the ST tires where yust enaugh to carry the axle load.
And your new G rated 3750 lbs AT 110 psi.
For the 3450 lbs maxload of the ST tires calculated with no reserve back the pressure for the new tires.
This is higher then the 80 psi AT-pressure of the ST tires, but these are calculated in maximum load for more deflection allowed.
If you would keep the ST tires they better also been kept at higher pressure then 80 psi , to give same deflection a LT tire of same sises would have, lesser heatprocuction so better for tires.
Most tiremakers did allow 10 psi extra above AT-pressure, nowadays not anymore in America. Europe still allows it.
But for you with the G rated not an issue anymore, only write it to explain the higher pressure needed then you would expect.
And this is only to compare, already is adviced to weigh.
Best per wheel( pair) , second best per axle, but as long as you did not do that , give the GAWR and GVWR ( gross axle/vehicle weight rating) , then I will calculate for that with a reserve I think is best, assuming you dont overload , as you stated already.
also give number of tires and axles of Trailer, and maximum speed you wont go over for even a minute.
Misyudging of the weights is more rule then exeption, so even though you think not to overload, weighing might prove you do.
Then I assume the ST tires where yust enaugh to carry the axle load.
And your new G rated 3750 lbs AT 110 psi.
For the 3450 lbs maxload of the ST tires calculated with no reserve back the pressure for the new tires.
This is higher then the 80 psi AT-pressure of the ST tires, but these are calculated in maximum load for more deflection allowed.
If you would keep the ST tires they better also been kept at higher pressure then 80 psi , to give same deflection a LT tire of same sises would have, lesser heatprocuction so better for tires.
Most tiremakers did allow 10 psi extra above AT-pressure, nowadays not anymore in America. Europe still allows it.
But for you with the G rated not an issue anymore, only write it to explain the higher pressure needed then you would expect.
And this is only to compare, already is adviced to weigh.
Best per wheel( pair) , second best per axle, but as long as you did not do that , give the GAWR and GVWR ( gross axle/vehicle weight rating) , then I will calculate for that with a reserve I think is best, assuming you dont overload , as you stated already.
also give number of tires and axles of Trailer, and maximum speed you wont go over for even a minute.
Misyudging of the weights is more rule then exeption, so even though you think not to overload, weighing might prove you do.
