Forum Discussion

path1's avatar
path1
Explorer
Aug 22, 2016

Using tire air inflation charts vs side wall markings

I air up to "max inflation" rating on tire sidewall, which is 80 psi.

Two years and about 15,000 miles later I've had fridge shelve bounce out, drawers slide out etc. Pretty stiff ride and rear kitchen doesn't help.

Thinking about using OEM "load/inflation" chart to see if I can get a smoother ride.

Anybody been through this? How much of improvement if any?
  • We've got same OEM as you. But a 25W. I think you have mid or front kitchen? Too much stuff in kitchen?...would never happen:B

    I ask why we need so much stuff in kitchen, but I certainly don't ask before a meal is served.:)

    And a side note, yesterday looking up some stuff for my pick up saw one of your track rigs. Don't know if its theirs or a customers. http://northlanddiesel.com/home.html
  • I'm in the "full psi inflation" camp also. But the problems we've had thinking about changing camps.

    Thanks
  • NO fair:B small class C.:) Our old x rental is the smoothest riding RV we've ever had. Your tires...we have them on our tow rig (pick up). We had great results with the old style regular street tread. We replaced the old with same except m/s tread and getting bad wear. Bad wear and measuring with a tread measuring tool. I'm missing a lot of tread. I think I'll be OK and can will be able to "age out" instead of "wear out" but disappointed in tread wear. Discount tire and OEM has a mileage warranty. Bad thing is the warranty is pro-rated when buying another set of them. Not credit for other tires, but buying another set of them. I'm not going to but another set of them. See my posting about it http://forums.woodalls.com/index.cfm/fuseaction/post/forum/28/thread/29008748/quote/29008769.cfm

    Thanks
  • azdryheat wrote:
    ...


    I've got shock absorbers, but just OEM cheapies. Next step after airing down (if it doesn't help) is to upgrade to something better.
    Thanks
  • A lot of "I've had fridge shelve bounce out, drawers slide out etc" has to do more with how much mass / weight is in the drawers when you're going around the corners too fast. For instance, the silverware drawer is always the first drawer to pop open if any of them do. There's way too much weight in it. The drawer with the hand towels never comes open. (Do we really need service for 12 in both dinner and salad forks or tee spoons and soup spoons and everything else???)

    Bill
  • Often debated question here on the Forum:
    I'm in the "full psi inflation" camp. I don't care about a smooth ride for the trailer, I'm not riding in it.

    I am in favor of not having a major blow out while towing and having all the grief that it causes. I want the max load rating out of my tires.

    Rear kitchen is certainly a contributing factor.
  • Taking blanket numbers like the max PSI on the sidewalls {which by the way is merely a statement of fact not an instruction to do so}, or the numbers posted inside the drivers door will often lead to bad results. Your tires should always be inflated to the proper psi for the load they are actually carrying.

    The chances that those fixed numbers which can not/do not take into consideration what loads are actually present have little chance of being correct. {Yep, even a broken clock is right twice a day .... but I digress...}

    Don't know what sort of rig you have but a trip to the local CAT scale is in order. I run my 24' Class C with E rated Michelin LTX M/S 2's at 60 on the fronts and 65 on the rears as this is the proper psi for the weight they are carrying. The ride is very smooth even with the heavy duty Bilsteins I run. If I inflated all 6 to the 80 psi max the ride would be insanely rough and the tires would wear out prematurely.

    As always.... Opinions and YMMV.

    :C
  • If you're talking about a trailer of some sort then yes, we have had drawers open up and things will shift in the fridge. My wife and three granddaughters rode in our toy hauler for about an hour and wife remarked that it seemed the trailer was trying to beat itself to death. It was a stretch of I-10 in AZ, terrible road. Most of it depends on the road plus these things don't have any shock absorbers. I used to keep the tires at 80 on my previous 5th wheel. My current triple axle toy hauler has less weight on each tire so I keep it at 70 but stuff still happens inside.