New tire psi question...
I try to run 85 tire psi on my coach but, as I drive, pressure increases to, often, 100 psi. That's not the maximum rated psi for the tires so that doesn't bother me but what does concern me is that a...
Forum Discussion
The tire manufacturers factor in the expected pressure change when determining the cold inflation pressure. The listed pressure is the minimum required to support that load.
The figures quoted for the relation between speed and weight capacity are very optimistic. In the Michelin Tire Manual, (Page 10) the chart shows that at 11-20 mph there is a 17% increase in load capacity if tire pressure is increased by 15psi over the maximum. An 8000 pound rated tire could carry 9360 pounds.
Michelin Truck Tire Manual
This procedure of carrying additional weight above rated load is for heavy truck and bus tires, it is not mentioned as a viable option for RV tires.
The figures quoted for the relation between speed and weight capacity are very optimistic. In the Michelin Tire Manual, (Page 10) the chart shows that at 11-20 mph there is a 17% increase in load capacity if tire pressure is increased by 15psi over the maximum. An 8000 pound rated tire could carry 9360 pounds.
Michelin Truck Tire Manual
This procedure of carrying additional weight above rated load is for heavy truck and bus tires, it is not mentioned as a viable option for RV tires.
