I have thick sidewall Nokian 1.9" studded tires on 45mm wide 'snow cat' rims.
When the black-ice conditions require studs I am riding at 2 bar, or about 30psi.
but the rate of speed is slow, then , and the rolling resistance larger, at lower PSI.

I cannot comment on you , your tires, and what conditions you will encounter.
that is for you to experiment with.

Different, wider tires have greater volume.. if you want to ride on the sand,
get as wide a tire as will fit. big apple 60mm perhaps.. Those are skinwall .
might ripple under hard acceleration like a top fuel dragster tires, then..