When/how/why max tire pressures raised from 35 PSI to 44 PSI?

RustyRatRod said

P metric sizes are "usually" a max of 35. Pressure varies with what load range the tire is. I have load range E on my truck. Their maximum pressure is 80 PSI. I run them at 60, because 80 would beat me to death in that old truck. That said, I have done both long term. Used the vehicle recommendations and used the max tire pressure for the given weight rating. I have found that the max pressure gives the most tread life. I will gladly give up a little ride quality for a tire that lasts longer.

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It was normal for a high load range tire to have a higher pressure, but I was surprised to see 60 recommended for a 215/70/15 car or light truck tire.
Since my Nissan 720 pickup was a small truck I thought it was going to knock fillings in my teeth loose (especially on these streets)
I always ***** about the streets here, but I don't think I ever gave a comparison as to just how bad they suck.
I have PST 1.03 T bars and 215/60/15 tires up front with the bars cranked up 2 inches over stock height and have hit my K on the pavement multiple times.
There is a right sweeping turn in the main street (4 lane) and a manhole cover in the left side of the right lane that is so inset into the street it slams the left suspension against the stop if you hit it during the corner.

THEN they have the balls to try and use 80k of the streets fund for another bronze statue at the civic center of a cop with his hand on a kids head.
Sometimes I feel like going down there and slapping some of those A holes on the counsel.