I have no knowledge of AI. Using US data for ratio is one thing but do remember that Pounds in the USA a not quite the same value as they are here it is the same with many US verses Imperial measurement units I suppose the most reliable measurement units are metric kg, km, Bar, little or no confusion likely. All vehicle manufacturers consult with the tyre industry but basically those tyre with the lowest volume of air tend towards higher pressures to support weight maintain temperatures within reasonable bounds for the weight that they experience. Larger volume tyres tend towards lower pressures for carrying the same weight and speed etc. Someone changing for instance from less voluminous tyre and changing to a larger volume would normally go down in pressure when setting tyres of course the construction of tyres differs.