Inflate tires to the mfgrs. tire placard posted in the MH. The RMA = Rubber Manufacturers Association published a pdf; CH 4, page 55, states "Inflation pressure recommendations may also be
determined based on the tire manufacturer's
specifications, which define the amount of inflation
pressure necessary to carry a given load. These
inflation pressures may differ from those found on
the vehicle tire placard or certification label.
however, never use inflation pressure lower than
specified by the vehicle tire placard, certification
label or owner’s manual. Nor should inflation
pressure exceed the maximum pressure molded on
the tire sidewall"
All major tire manufacturers are members of the RMA, and subscribe to their recommendations.
Michelin, Goodyear, Firestone, and many other tire mfgrs are members of the RMA. Visit their websites and you'll see they all state this same fact.
Here is the
RMA pdf