rhagfo wrote:
jefffoxsr wrote:
I called the tire manufacturer for my new tires. They said absolutely you can run under 50 psi in load range E tires. They said to refer to the tire and rim association load and inflation tables which also show load rates for inflation pressures as low as 25 psi for load range E 10 ply tires. I have this table and found it again on the internet to confirm it.
Some tire manufacturers publish documents showing what they determined to be the proper air pressure for their particular tires to meet OEM standards. They use the tire and rim association table as a starting point to make their determination for their specific tires. These are interesting to look at.
Anyway. I am satisfied, based on the above information, that I can safely run lower than 50 psi on my new tires.
Ding...Ding....Ding we have the winning answer!!
When will people realize the 80 psi on most E rated tires is the MAXIMUM pressure for the MAXIMUM LOAD!
If one is running empty, and you have 3,000# on the rear axle, and tires rated for 3,415#+ EACH you don't need 80 psi of air in them, you are greatly reducing the tires contact patch on the road, resulting in poor traction.
Actually, the inflation pressure stamped on the sidewall of MOST tires, regardless of Load Range or type, is the maximum pressure for the maximum allowable load.
The tire pressure on the door label is the required pressure for the GAWR and/or GVWR of the vehicle.
Tire inflation pressure should be adjusted to maintain the maxim,um contact patch between the tire and the road. Over inflated or under inflated tires will have a smaller contact patch, which is unsafe, and the tread wear will be uneven.
It really is just that simple!
