Tire Pressure is HUGH, especially on steer tires. I am fairly confident outside companies that mount the tires for the factories do not air the tires per the advertised pressure. Most likely they use some pre-determined pressure, like 100 - 105 PSI, across the board. If you look at a tire OE chart the Pressure is tied to the Load Rating. This can vary from 105 to 130 PSI.