Tire pressures and axle weight

What tire pressure are your tires at now?
I have a F53 chassis the front is 6000# & the rear is 13,000#
I'm running at 100 psi.

How did you get 95 for the rear? At 10,540 lbs on the rear that's 5,270 per axle end. With duals that's 2,635 per tire. Of course this assumes side to side weights are equal. Anyway you're at the minimum inflation of 80 psi recommended by Goodyear on all tires. Using Michelin charts puts you at 80 psi all tires as well.

vandave wrote:
Purchased ourf first class A, 2017 Winnebago 31BE, and are starting to get it ready for at our trip south. Once loaded, I will have it weighed to ensure front and rear axles have weight distributed somewhat evenly and that I am not exceeding max. Total weight. I've towed several different RVs but never used a Class A before. I am concerned about correct tire pressures and have scouted the web for information and am a little uncertain what amount of air in each tire. My travel trailer tires were always inflated up to about 80lbs. As I understand it, there is no reason to inflate Class tires to about the maximum. I think my 19.5 tire max is 129 lb and most are putting 85 to 90 lbs in their class A. Also, it has been posted several places to put the tire pressures based on chart that calculates proper pressure to axle weight. Where does one find such a chart? And it has been recommended to have each axle tire weighed individually. How is that done? Going through a truck stop I can get total weight and front and rear axle weight but not each tire weighed separately. At 70,there's always more to learn. Help me out if you will. Thanks.

Tires are tires and most any inflation chart will work for your brand. The main thing is to add 10 - 15psi for a cushion and for taking care of all the variables.
Here's one that should work for you, as well as any.....TIRE INFLATION CHART
Here's.....ANOTHER

So, I just finished packing and weighed my Winnebago 31BE. Gas full, propane full, no water, too cold,; we drive with very little water. Steering axle 6,300 lb, drive axle10,540 lb with ab gross weight of 16,840 lbs. we have Goodyear G670, 245/70R19.5. I read the tire chart recommended weight approx. 95 for the rear and 80 for the front. Would someone with a few minutes confirm my findings? That's a lot to ask but I'll give you lots of thanks. :-)

I also own a Winnebago and tire charts giving to me were bogus! Both manuals Michelins and Winnebagos both said to run my tire pressure at 85 lbs. rear and 90 lbs. front. This didn't work for me due to I was experiencing tire squirm on the rear axle. What I did is take notes on the handling of my coach every time that I went out camping using different tire pressures. I settled on 100 lbs. all around! These tire pressures worked so well for me that I was able to get 10 years out of that set of tires. I'm now in my 3rd year of my second set tires. You have to experiment to see where you get the best ride! What works for me possibly will not work for you! And remember the lower tire pressure you run the more heat build up you will have inside your tires. I'm not a tire expert far from it but, I have a lot of knowledge about tires from being a truckdriver who logged over 4 million miles over the road. I'm now retired after 44-1/4 years of driving. I've never weighted all 4 corners of any of my RV's and I have been RVing since 1976. My last and current coach that I bought new in 2004, I weighed my front and rear axle with all tanks being filled when my coach was new and I was overweight! So I never bothered to weight again! Good Luck, Rooster

I disagree that 4 point weighing is not important. While knowing the total axle weight is a good starting point, knowing if one side is heavier than the other is more important. The reason I say this is because you must inflate the tires on the same axle to the weight required to support the heaviest point. If the right rear is 8000# and the left rear is 10,000# then both tires must be inflated to the recommended inflation for 10,000#. That's a pretty big exaggeration but left and right weights can vary a good bit. This weighing also gives you the opportunity to move heavy stuff from one side to the other to help keep the coach in as balanced a situation as possible.
You do not want to over inflate or under inflate any of your tires to get the maximum use and comfort (over inflated tires make your RV ride like a tank!). You do want to inflate your tires to the "right" pressure and no one can tell you what that is until you have the coach properly weighed.

Do not over think this. Get a tire chart from the manufacturer or one of the links above. Then set the pressure to the proper amount for your GAWR's. Then if it will help you sleep better at night, or satiate an OCD need then get it weighed and adjust pressures down as desired. If you are overweight start throwing things out.

But do ignore the psi printed on the tire. It is of no value unless you have the wrong tires.

Just my opinion of course.

Since your coach is new Ford probably installed tires from one of the big name manufactures, Goodyear, Michelin or maybe Firestone. You'll need to dig a bit on their web sites to find the pressure tables. Probably in the commercial truck section.

You'll find that the tires have a much greater weight capacity then the chassis axles so inflating to sidewall max will have you grossly over inflated.

Goodyear

Michelin

Firestone

As a fall back Winnebago installed a placard near the driver's seat. The placard will list the recommended pressure based on the recommended tire size and the maximum axle capacity. More or less this is your maximum pressure if the coach is loaded to the maximum GVWR. Add 5 psi just incase your travel partner starts collecting rocks from all the places you visit.

The Long, Long Trailer

What size are the tire? Generic tire chart should be found on TireRack.com, Toyo.com and Goodyear. All should be close.
Many truck weigh stations have enough room to pull right or left side on to get side weights. Commercial scales normally cannot do this.
I would inflate to around 85 pounds, weigh rig and adjuct from there.

Inflation chart

vandave wrote:
Purchased ourf first class A, 2017 Winnebago 31BE, and are starting to get it ready for at our trip south. Once loaded, I will have it weighed to ensure front and rear axles have weight distributed somewhat evenly and that I am not exceeding max. Total weight. I've towed several different RVs but never used a Class A before. I am concerned about correct tire pressures and have scouted the web for information and am a little uncertain what amount of air in each tire. My travel trailer tires were always inflated up to about 80lbs. As I understand it, there is no reason to inflate Class tires to about the maximum. I think my 19.5 tire max is 129 lb and most are putting 85 to 90 lbs in their class A. Also, it has been posted several places to put the tire pressures based on chart that calculates proper pressure to axle weight. Where does one find such a chart? And it has been recommended to have each axle tire weighed individually. How is that done? Going through a truck stop I can get total weight and front and rear axle weight but not each tire weighed separately. At 70,there's always more to learn. Help me out if you will. Thanks.

Vandave,
While "Four corner weights" are nice to know, it's not imperative that it be done. Been RVing for 35 years and never done it. I've weighed my four different coaches, front, rear and total, and that's all I've ever done. I base my tire pressures on what the tire charts say for the weights I obtained when weighing them. The charts you ask about can mostly be found on the net. You simply Google or whatever browser you want to use, the tire manufacture that you have and type in "....tire manufacturer....weight chart".

On our coach, it's really not applicable to move stuff around trying to equal out all the four corners. Stuff either fits where Iv'e got it or, it ain't going with us. About 100K - 150K of RVing miles in the last 35 years or so and haven't damaged any tires yet, due to having one corner loaded more than any other. Not saying don't do it, it's just not plausible for me in my particular situation.

And, you say your max is "129 psi"? Wow, to me that's pretty darn high for a 19.5" tire. I don't recall my 19.5s on our previous coach, a '99 Fleetwood Bounder 34V with the F-53 chassis, ever having that kind of PSI in the tires. I think they might have been in the 70s for the front and 80s for the rear, been a while.

Anyway, at a minimum, get your coach weighed, front, rear and total so you have a starting point at which to set your tires at, after consulting the manufacturer of your tires, tire chart.
Scott