I know on the Cobras we have found 40psi to be the sweet spot. Regardless of what the sidewall states which is the maximum psi.
Yeah, Ive learned to check the pressure regular on front to rear rotation tires since the cant be flipped to balance.
I've run between 25 to 40 in mine messing around and no matter what pressure I run the rear tires wear in the center, he he. I keep them around 34 in the front and 32 in the rear and rotate/balance them regularly.