Here is
some information on your Toyo tires check the four links within it especially the tech bulletin references. Some MFG's reconmended not to use Toyo tires on their vehicles especially the steer tires.
It keeps referring to the placard that is near your drivers seat on the wall and which the tire pressures were when coach was delivered to you.
When I got my new coach the tires were inflated to the max on that placard 100psi after I loaded my coach with fuel and water I wanted to carry and all our personal stuff plus eats I went to a CAT Scale and got the coach weight.
Following the
Michelin tire pressure tables I could reduce psi to 90psi steer tires and to 85psi on rear duels.
Made quite a difference in ride and driving on some of the bad highways of the U.S.A.
I have always had Michelins on a Newmar coach I believe they knew what loads would be applied in their coach's and picked Michelins for that reason.
I changed my steer tires last year because of edge tire wear and the four rear tires are the original tires on coach in good condition, for ten years old, because I take care of them.