gaijin
GOLD Star
To assume that LT tire pressures can be derived from some base pressure because it was only ever about load - bamboozle.
If you honestly believe that, then you should contact Toyo Tires and tell them that their engineers who published the following document - describing just how to derive LT-Metric tire pressures from the OEM base pressures - are full of s**t:
Guidelines for the Application of Load and Inflation Tables
While you're at it, probably best to send another letter to the TRA (Tire and Rim Association - found Here) as they are the source for the tire specs and Load/Inflation tables that tire manufacturers must meet. You should also inform them that their entire organization is full of s**t.
Further, just to make sure you cover all the bases I have in my research, send yet another letter to the JATMA (Japan Automobile Tyre Manufacturers Association - found Here) as they are the primary source used by TRA to establish a minimum RCTIP for LT-Metric tires of 35psi based on destructive testing under load. The nice folks at JATMA are very cordial and open to discussion, but they may not fully appreciate your use of the English vernacular s**t, so better just call them baka.
Or... just continue to bask in your righteous indignation and mislead folks with your "feelings."
HTH