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lowest air pressure you have ran

Discussion in 'The Garage' started by VirginiaBulldog, Jul 9, 2003.

  1. VirginiaBulldog

    VirginiaBulldog Registered Member

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    what's the lowest tire pressure you have ran with 35X12.50 tires on 15x8 rims? This is on my roomate's jeep. TIA
     
  2. Silver84k5

    Silver84k5 1/2 ton status

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    cant say ive ever ran those tires on a jeep but i would say..

    if it were my rig i would run 9 in the front 7 in the rear for trails

    i would run 6 in the front 4-5 in the rear on sand....
     
  3. VirginiaBulldog

    VirginiaBulldog Registered Member

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    no problems with them unseating because of the difference in rim size to tire width. I run 15x10 rims with the same tire on my blazer. What's the rule for rims vs. tires vs. pressure? I have no idea.
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    on my 38x13x16in tsl's with 16x6.75in rims i run 24 street 12 on the trail and 4-5 in the sand
     
  5. BowtieRed

    BowtieRed 1/2 ton status Author

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    no beadlocks, i ran 39/18/15 mickeys on 15x14 at 3.5psi. . . .i didn't really know it for awhile because they have such a big surface area it didn't sag that much.
     
  6. Judd

    Judd 1/2 ton status

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    I had 35X12.5s on 15X8s on my CJ5. I ran then around 10psi most of the time. Never a had a bead pop off.

    I've ran them down to 8 psi a few times but I got dirt in the bead area once that caused a air leak. That worried me a smidge so that was the last time I ran them at 8psi.
     
  7. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    nope no beadlocks just stock chevy rims /forums/images/graemlins/thumb.gif
     
  8. Pookster

    Pookster 1/2 ton status

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    depends on the terrain, is my rule of thumb. If you run lower pressure you risk more sidewall dammage (Im sure its not terribly a lot more, but eh...). If the trail your doing has sudden hard changes (jagged rock, or a ledge you might hit at any speed), I'd keep about 15-18 for good measure. If your running only sand, maybe 10-15. It really depends on too many factors, if its really grippy terrain, and you run low pressure, I've seen some people spin the wheels with the tires not moving. I've also seen people air down to about 8 PSI, doing a small hill climb, hit a small rock (4"?) which managed to pinch the tire (tire seemed un-dammaged) but managed to bend the steel rim, enough to leak air. He hammererd it back in and all was good, but... you know, just letting you know low air pressure can have that effect.
     
  9. 55Willy

    55Willy 3/4 ton status

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    I ran mine that way on my Jimmy with 7 PSI on all 4. the bead ain't going anywhere. I'll be running my 38.5 x 14.5 x 16.5 at the same PSI on the willy's...oh yeah...beadlocks /forums/images/graemlins/thumb.gif
     
  10. Sandman

    Sandman 3/4 ton status Author

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    With that setup and the lighter jeep, I'd run around 10 pounds. I run that pressure with the heavy Blazer and do fine. I drop to 5 if I need it in snow and stuff. at 4 pounds the tires start to burp air.
     
  11. VirginiaBulldog

    VirginiaBulldog Registered Member

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    Thanks all. I'll let him know not to worry about it.
     
  12. MEPR

    MEPR 1/2 ton status

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    i run the 33x10.50 tsls on my 150 at about 24psi
     

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