I've asked this question before...
A number of you responded a few months ago to the following question and I've tried to pull the topic back up but been unable to locate it. So, please allow me to restate the issue: Based on weights, ...
Forum Discussion
To the OP, each manufacturer determines what pressure the OEM tires require to support the vehicle they have manufactured. After they are replaced there is more homework to do as you have found. Knowing how much weight is sitting on that axle compared to the tire makers inflation chart may be the solution you seek.
