The Michelins ride better than truck tires or the GY670sbecause they have softer sidewalls.
We put Michelins on the steer axle and are considering whether to do the same n the drive axle.
We follow the inflation recommendations on the motorhome behind the drivers seat.
Maximum pressure beat us to death, and loosened some things up. We don't carry, that is most of don't the heavy loads for those pressures like a semi.
Soft side walls means more squirm beside the softer ride though.
I am thinking hoping the same tire on both axles will even out the tendency to squirm around.
I read every post about tires on motor homes trying to keep abreast of what is working for everyone.
I don't think I want to go back to a stiff tire on steer axle unless we put some lead in the front end though.
Steer Safe and soon may be the way to go.
I'm going to keep reading here and see what is working for others.
It's not much fun using the stering wheel as a tiller.