No, it's not. But it is related. 4 tires x 38 psi each = 152 psi, or 10.6 kgf/cm². So if all four tires blew at the same time your vehicle would be lifted up. Not very high, but up (assuming the tires blew out when the blow-out spot on each was down). Overinflate your tires enough and you could put your vehicle into orbit.