Yet another tire pressure question.

vonkal wrote:
Thanks Dennis. Are you suggesting I use the 85 and 95 lbs pressure, as the chart shows, +5? I would love to do this as the coach rides a little stiff now. The tires are currently at 115 on the front and 100 on the rear.

I have already installed a TPMS, and it seems to be working fine.

The coach is already what I would call "camping ready" with food, fuel, propane clothes, some tools, etc. I will watch the weights and pressures carefully, but if you think I should start with the recommended pressures, +5, I will do that and see how it goes. The TPMS gives me some confidence that I am not running it too low, and should let me know if I am in the ballpark.

I have set the reserves to zero and used the tire specifications for the first goodyear tire wich you gave in first post, so to my opinion wrong, and even conversed maximum load to max speed of 100km/62m/h , then advice 93F and 81R. But this would bring it to the limits. A little unequall loading R/L and/or misreading of pressure , and/or more loading,and/or higher speed, brings it in the danger-zone.

An inside tire temp of about 112degrF/45degrC, when driving about 60m/h, is normal and this gives a pressure rising from cold pressure filled at 18degrC/65degrF of about 10 to 11% . So if your TMPS gives that its most likely save for the tire.

Because driver and co driver are sitting above the front axle, front pressure has most effect on comfort. So you can leave rear to higher pressure.
But to my opinion the comfort wont get much better at 95 psi then at 115 psi front, but mayby your experience after the trip can make me chanche my opinion. This is because the construction of the suspencion of the motorhome that is in fact a middle weight Truck.

But mind that you dont feel what you expect and want to feel, try to be objective.

Have a nice trip