Registed to this forum to react .
Call myself tire-pressure specialist nowadays, story began end 2007 when I got hold of the European Formula sheet from standards manual of ETRTO ( America TRA ) and went running with it.
Gathered a lot of information about tires maximum load and needed pressure.
Now google dayly for it to see if my gathered knowledge can be of use.
Here also the discussion about ST tires .
Made a topic on RV forum for comparing and by that you can get wiser why "maximum pressure" is adviced .
RV.Net Open Roads Forum: How to compare tires for replacement and needed pressure
But to give a start , what most think is maximum pressure is in fact the pressure needed for the maximum load up to maximum speed of tire or if lower 160km/99m/h or for ST 65m/104km/h.
Also called AT-pressure, maxloadpressure, referencef-pressure ( in the formula sheet i got) .
This is not the maximum pressure of a tire , for ST tire makers mostly allow 10 psi extra for higher speed or riding quality.
But you are allowed to drive for instance only 50m/h when filled with adviced pressure for 75m/h. Better for the tires so lesser deflection and lesser heat production.
Wont introduce myself in a seperate topic, dont have an RV anymore, and only react on tire related questions.
Greatings from a Dutch Pigheaded self declared tire-pressure specialist.
( ja dat is ) Peter ( from a dutch name song part of text Yeah thats Peter translated)