I have 21 feet boat with double axel I use 48 PSI.
I like to be soft ride. 60 PSI is maximum of your tires and is to hard in my opinion.
If they respect you, respect them. If they disrespect you, still respect them. Do not allow the action of others to decrease your good manner, because you represent yourself not others.
-2001 Maxum 2100 SR2 Sport -1997 Regal 258 Commodore (Sold)