The continuing saga of tire pressure...
My coach has been weighed and according to the tire manufacturer's PSI chart, I should be carrying 80 psi. But, when you (or I) have new tires installed, the tire company insists on pressuring up to t...
Forum Discussion
The main objective of pressure for the load is to assure the belts, viewing shoulder to shoulder, are flat on the pavement. Too much pressure: center has more pressure, narrowing the footprint, poor braking ability, rough ride, forcing stress on edge of the tread belts.
Underinflation, more stress on edge of belts, more flexing in sidewalls producing excessive heat buildup.
Both over & under inflation have many more detriments I won't take time to list, but that is why manufacturers publish PSI/load charts.'\
To address other questions, there is an age-old battle between vehicle (car, truck, RV, you name it), manufacturers and tire manufacturers. Vehicle manufacturers will typically recommend lower PSI, because they want the best ride, but tire manufacturers recommend higher PSI because they want to assure the tires give best mileage.
Bottom line, you are wrong if you overinflate, or if you underinflate, for the load you are carrying..............period ! ! ! !
Underinflation, more stress on edge of belts, more flexing in sidewalls producing excessive heat buildup.
Both over & under inflation have many more detriments I won't take time to list, but that is why manufacturers publish PSI/load charts.'\
To address other questions, there is an age-old battle between vehicle (car, truck, RV, you name it), manufacturers and tire manufacturers. Vehicle manufacturers will typically recommend lower PSI, because they want the best ride, but tire manufacturers recommend higher PSI because they want to assure the tires give best mileage.
Bottom line, you are wrong if you overinflate, or if you underinflate, for the load you are carrying..............period ! ! ! !
