Best Tire Pressure Voyage 35L

[BigDaddy1951]

I usually run close to the max air pressure in my tires. I can’t weigh my Winnebago Voyage 35L every time we use it. Often just the two of us, but sometimes four adults and two kids. I have three year old Michelin XRV tires. Just for my information, what pressures do you run in your tires giving the best handling and safety? The reason I ask is that recently we left heavy, so I put in 100 front and 90 rear. Rode and drove OK. We returned light, and it rode hard and light winds seemed to push us around a lot. By the way, I use a hand pressure gage and tire minders (Which I love). Thanks in advance for your wisdom.

[tropical36]

naturist wrote:
The simple truth is that the optimal tire pressure is a function of the weight that tire is carrying, and there is no magical one-size-fits-all pressure. If you put in enough air to safely carry a heavy load, then run light, you will get a hard and squirrelly ride, as you experienced. If you fill to optimal for a light load, then pile on lots of weight, you’ll get a wallowing and squirrelly ride. It’s directionally unstable both ways, just for different reasons.

Although you can’t weigh every time you start the engine, you can adjust the pressure to light or heavy pressures based on an estimate.

Running a big class a motorhome with under inflated tires, will get you some instability alright and especially with the $ damage of a fender well that gets blown out, along with the tire. This at best and if a steer tire, keeping it in your lane, might be a challenge for some.

[naturist]

The simple truth is that the optimal tire pressure is a function of the weight that tire is carrying, and there is no magical one-size-fits-all pressure. If you put in enough air to safely carry a heavy load, then run light, you will get a hard and squirrelly ride, as you experienced. If you fill to optimal for a light load, then pile on lots of weight, you’ll get a wallowing and squirrelly ride. It’s directionally unstable both ways, just for different reasons.

Although you can’t weigh every time you start the engine, you can adjust the pressure to light or heavy pressures based on an estimate.

[tropical36]

BigDaddy1951 wrote:
I usually run close to the max air pressure in my tires. I can’t weigh my Winnebago Voyage 35L every time we use it. Often just the two of us, but sometimes four adults and two kids. I have three year old Michelin XRV tires. Just for my information, what pressures do you run in your tires giving the best handling and safety? The reason I ask is that recently we left heavy, so I put in 100 front and 90 rear. Rode and drove OK. We returned light, and it rode hard and light winds seemed to push us around a lot. By the way, I use a hand pressure gage and tire minders (Which I love). Thanks in advance for your wisdom.

You really need to weigh each axle, but only once and when the coach is fully loaded. Then add 10 - 15psi over the inflation chart, for taking care of all the variables, of which there are many. Use this for cold pressure and for checking it often, like right before getting underway.
I probably run a little more than I need to, but that's a whole lot better than being under. Coach rides nicely, with whatever, so that's never a consideration.

[MountainAir05]

Here is what I did, I filled the holding tanks full and the fresh water full and the gas full. Just the two of us. I then weight the vehicle and got my load per axle. That is the max weight that you will never have unless you travel with everything full. Dump the black/grey and put the fresh water at where you travel at. We stay around just a little over a 1/4. Then set the tire pressure and that is where I ran them. My tires are 19.5/245. I ran then for 10 years and never a issue. Handling and ride was good. Even wear. 78000 miles on them. I do not add pounds as many other state.

As you said, hard to weight every time you travel.