Actually …don’t!….. the pressures on the sidewall is max…. meaning all they recommend that the tire can safely hold ….. add pot holes and other such impacts and you put yourself in a hard position. Think of your tire as a balloon, full it slam full of air and the clap it with your hands. Did it pop? If your tires are already at max pressure (which yes I am aware they understate it intentionally) and hit an impact…. that pressure has to go somewhere and if there is no more expansion room left in the or around the tire itself…….. guess where is left…. OUT.
Some companies play it safe and under rate the pressure, thats to help keep the mis informed “safe” , however they cannot compensate for the rate at which an impact can/will hit a tire if over inflated.
I know in other forums there are statements of better performance at higher pressures. Let them be the guinea pigs. And also make sure of what tire they are using the higher pressures in. Not all tires are created equal!