Forum Discussion

georgefarl1945's avatar
May 14, 2015

New tire / Old rims

I would like to replace D tires with E tire. Can I use the E tires on 15x6JJ rims and use 70 PSI on the E 80 PSI tires with out harm to t he New tires.
I now have OEM Trail Express tires which are 4 years old and show small cracks in side walls. ST 225/75D15. Change to ST 225/75R15 LRE Greenball tires
  • ScottG wrote:
    I honestly can't imagine that a metal rim would give up over an extra 5 or even 15 psi. It's probably just the pressure at which they were tested or certified for DOT and they could just as easily take more.
    I would get the tires you want and run them at 70 or more psi.


    x2 but we have seen a few reports of wheel failures on the forum. What is not known is why those wheels failed. May not have had anything to do with pressures.
  • I honestly can't imagine that a metal rim would give up over an extra 5 or even 15 psi. It's probably just the pressure at which they were tested or certified for DOT and they could just as easily take more.
    I would get the tires you want and run them at 70 or more psi.
  • I will go look at mine.

    I know I have 2 different ratings and you may be correct that there is a load rating only, but each load rating had a different pressure rating as well. The 2600lb wheels are only rated for 65 psi. I will go look and report back if they are stamped or it was discovered thru additional research.

    EDIT: Looks like my wheels on have the weight stamped in them. 2600 on 4 and 2830 on the one I bought as a 2nd spare. I don't use the 15's anymore so I gave 1 away.

    In a quick search I have found 2600lb 15x6" wheels rate for 60, 65, or 75 psi. Makes me wonder if they are really pressure limited or not.
  • I'm betting there is a weight rating stamped on the backside but no psi rating. That's how mine are and I went to the Maxxis LRE and run 75 psi. Having some reserve capacity on the tires is a good idea.
  • I would pull a rim and look at the stamped markings on it. Many 15x6" trailer rims are only rated for 65psi.

    However the LRE tire will carry the same weight at 65 psi that a LRD tire will at 65 psi, so if your LRD tires are rated for your weight the LREs will be fine at 65.

    It is possible your wheels will take 80 psi, but you need to look at them to know.
  • I suggest installing steel valve stems and balance the new tires.