Originally Posted By: daves66nova
So then what determines air pressure ? The vehicle itself,the rating of the tire,the load being carried?
Load tables, vehicle handling requirements, ride quality. Obviously some margin of error as well.
Originally Posted By: daves66nova
Originally Posted By: Stewart Fan
Your friend is correct. 35 PSI would be the minimum pressure required to carry the max load the tire is rated for.
what then would be maximum?
The recommended tire pressure is the correct tire pressure. Some vehicles may have a separate tire pressure recommendation in the owner's manual for when the vehicle is heavily loaded, but this is not common.