Originally Posted by Chuck_S
Cold tire pressure is listed on a placard in the driver's door jam. Maximum tire pressure -- which is just that -- is on the tire sidewall and is way too high for passenger car tires. Maybe for trailer tires but not for a motor vehicle.
I think you are wrong to say sidewall maximum pressure is way too high for a motor vehicle. The MBS motorhome (a motor vehicle) rides on Light Truck tires, not passenger car tires. Depending on the RV weight, ideal pressures for class Cs do in some cases run near the tire sidewall maximum rating.
As an example, and while not an MBS chassis, my class C Ford E-450 chassis requires, per tire load chart, just shy of 80 PSI (the sidewall rating) on the rear duallies to carry the axle rated 9600 pounds. The door placard recommends the same pressure as the sidewall maximum for the rear tires.
I think your post is possibly misinforming the OP.