Forum Discussion

Usnthedog's avatar
Usnthedog
Explorer
Oct 22, 2013

Correct tire pressure

I know this gets touched on occasionally but I'd like to see a full discussion. I have load rating E tires. 3450 lbs at 80 psi. I run about 5000 lbs per axel. I've seen the ratio addressed: 2500/3450 * 80 = 58psi. I've been running 80 psi but I'm looking at new tires and would like to know what everyone thinks about pressure: 58, 80 or somewhere in between.

5er with dual axles. Towmaster tires right now. Thinking Maxxis.


Thanks,
Jeff

39 Replies

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  • Michelle_S's avatar
    Michelle_S
    Explorer III
    Oct 22, 2013
    Just keep in mind how much those side walls twist when you're jack knifing into that great camping spot. Now if your tire pressure is too low you run the risk of rolling those tires right off the rims. So it may ride softer on lower pressure, you do run a risk of popping the tires off the rim, remember you need pressure to keep the tire beads against the rims.
  • Dog_Folks's avatar
    Dog_Folks
    Explorer
    Oct 22, 2013
    Jbechtoldt wrote:
    I always run my TT tires at the max cold pressure listed on the sidewall no matter what the load of the TT.


    X2
  • wandering1's avatar
    wandering1
    Explorer
    Oct 22, 2013
    Run the tires at what's recommended on the sidewall, tires will overheat when you run them underinflated or overinflated which damages the tire. If you still have questions contact your tire dealer or tire manufacturer for answers to your questions. Personal opinions cause tire damage, get the facts.
  • Jbechtoldt's avatar
    Jbechtoldt
    Explorer
    Oct 22, 2013
    I always run my TT tires at the max cold pressure listed on the sidewall no matter what the load of the TT.
  • shadows4's avatar
    shadows4
    Nomad
    Oct 22, 2013
    We put E rated Maxxis on our unit before we picked it up. It had D rated tires before. Trailer has a gvwr of 9600lbs. The tire dealer had tires inflated to 80 psi. We found that made the trailer bounce all over the place. Lowered pressure to 65 and got a much better ride and the stuff in the trailer seemed to stay put better. We do not have shocks on the trailer.
    That's my experience.
  • deleted-2's avatar
    deleted-2
    Explorer
    Oct 22, 2013
    Just guessing a bit here.

    I agree with 45Ricochet that max allowed inflation depending on the brand\size will run cooler.

    I know from experience that a softer tire (under-inflated) is prone to damage from curb impact or road hazards.

    Been staying with the maximum 80 pound recommendation for the factory tires on the fiver we have.
    Keeping fingers crossed here.
  • pugslyyy's avatar
    pugslyyy
    Explorer
    Oct 22, 2013
    Most tire manufacturers publish an inflation table. I recommend getting it and using it and doing what is right for that specific tire.

    For example, here is the Toyo Tire one (since that's what I run)

    http://toyotires.com/tires-101/rv-tire-care

    http://cache.toyotires.com/sites/default/files/rv_inflation_tables.pdf

    Good luck!
  • enblethen's avatar
    enblethen
    Nomad
    Oct 22, 2013
    I think 58 would be low. I would be looking at 75 or maybe even max 80.
  • 45Ricochet's avatar
    45Ricochet
    Explorer
    Oct 22, 2013
    FWIW I ran 80 in my Towmaster's and they failed. I must have did something wrong :W
    All kidding aside, they will run much cooler at 80 PSI.

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