From an engineering point of view, if you were to try 150 psig in a 37mm tire and did not split the tire, you could risk damage to the rim. Some rims are rated for max pressure for different tires sizes. My 37mm tires are rated for 87 psig, my 700c tiouring bike rims are rated for 88 psig with 37mm and 103 psig with 28mm tires.