PSI With New Tires...
I've been towing a 26' 8,000# camper with my Ram 1500 for the past 4 years with the stock passenger tires. Door jamb says 39 psi. Tomorrow I am having a set of BFG LT tires put on and was wondering ...
Forum Discussion
P tires "max load" come at 35 psi even though the tire psi may go on up to 44-51 psi.
Looking at P and LT load/pressure charts show a LT tire needs around 50 psi to get the same load as the P tire at 35 psi.
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This from one of our members (CapriRacer) who is a tire engineer (snipped from one of his threads)
LT requires 15 psi increase above P tire pressure
** Perhaps I should have approached this from a different angle - and I'll do that after I clear up an issue.
The maximum pressure is not the same as where the load carrying capacity maxes out. On P metric Standard Load tires, the load carrying capacity increases as the inflation pressure increases - up to 35 psi.
The maximum usage pressure for a Standard Load P metric tire might not be 35 psi - it might be 44 or 51 psi, but that doesn't change the relationship between the pressure and the load.
Don't believe me? Find a load table for P metric Standard Load tires and see for yourself. They all end at 35 psi. **
Looking at P and LT load/pressure charts show a LT tire needs around 50 psi to get the same load as the P tire at 35 psi.
*******************************
This from one of our members (CapriRacer) who is a tire engineer (snipped from one of his threads)
LT requires 15 psi increase above P tire pressure
** Perhaps I should have approached this from a different angle - and I'll do that after I clear up an issue.
The maximum pressure is not the same as where the load carrying capacity maxes out. On P metric Standard Load tires, the load carrying capacity increases as the inflation pressure increases - up to 35 psi.
The maximum usage pressure for a Standard Load P metric tire might not be 35 psi - it might be 44 or 51 psi, but that doesn't change the relationship between the pressure and the load.
Don't believe me? Find a load table for P metric Standard Load tires and see for yourself. They all end at 35 psi. **
