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Safe PSI to air down to?

Discussion in 'Off-Roading & Trails' started by Madjik_Man, May 2, 2012.

  1. May 2, 2012 at 9:58 AM
    #1
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    So I've always been afraid to air down too much because I don't want to lose the seal/bead (is that what it's called?) on the trail.

    Last time I wheeled I kept the tires inflated at 32 psi and obviously it caused a lot bumpier of a ride, but worse, I got bounced around to the point of crushing my rocker panel.

    What's a safe psi to air down to without fear of losing the bead?

    I'm on the stock 15" alloys running 31 x 10.5 BFG all terrains.

    Thanks.
     
  2. May 2, 2012 at 10:01 AM
    #2
    mcdowell

    mcdowell My name is Mudd

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    Carry some either and matches if it does come off.
     
  3. May 2, 2012 at 10:05 AM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Alot of it depends on how you drive. Ive seen guys run 0 psi ( thats Zero ) on BFG's in sand, and have no issues. They have a strong sidewall, and are reluctant to come off the bead. I useually ran 10 PSI on my BFG's in sand, and 15 in rocks.
     
  4. May 2, 2012 at 10:25 AM
    #4
    SargeSlapnuts

    SargeSlapnuts SargeSlapnuts 보고용의!!!!

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    10 in sand and 15 in rocks in mud is about spot on for your tires. in sand i have to drop to 8psi or so cause my tires have a tendency to dig in very easily
     
  5. May 2, 2012 at 10:36 AM
    #5
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    ^ Ether and matches?

    Please elaborate.
     
  6. May 2, 2012 at 10:38 AM
    #6
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    I'm really never on sand (unless I make the trip to the sand dunes). I'm on forest service roads treading lightly.... often over rocks, etc...
     
  7. May 2, 2012 at 10:41 AM
    #7
    rondog

    rondog your TW web developer!

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  8. May 2, 2012 at 10:53 AM
    #8
    fadippides

    fadippides Well-Known Member

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    When I had my 2001 Xterra stock PSI was 26 (lowest I have ever seen OEM). I still aired down for certain situations but never extreme like mentioned here as I was mainly on pavement.
     
  9. May 2, 2012 at 11:05 AM
    #9
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Good god...

    If I ever tried that and recorded it, I'd go down in the TW annals of stupidity.

    Beating out the kid who got pulled out of sand in park and the other dude who jumped his 2nd gen and destroyed it.
     
  10. May 2, 2012 at 11:06 AM
    #10
    fadippides

    fadippides Well-Known Member

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    I recall seeing Top Gear do that when they knocked a tire off the rim....they were in the artic though, and it made for good TV.
     
  11. May 2, 2012 at 11:13 AM
    #11
    la0d0g

    la0d0g Its 4 o’clock somewhere

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    Why is that?
     
  12. May 2, 2012 at 11:19 AM
    #12
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Cause I'd probably blow myself up and take rubber shrapnel to my entire body all the while setting a forest fire ablaze.

    :eek:
     
  13. May 2, 2012 at 11:22 AM
    #13
    SargeSlapnuts

    SargeSlapnuts SargeSlapnuts 보고용의!!!!

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    yeah mounting a tire like that is rather scary. i have had to do that on a large equipment tires. took me about an hour cause i didnt wanna blow the bitch up in my face but we got the tire back on the rim while it was still on the machine
     
  14. May 2, 2012 at 11:24 AM
    #14
    la0d0g

    la0d0g Its 4 o’clock somewhere

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    :) Fair enough. In an emergency that technique can really help get you out of a bind though.
     
  15. May 2, 2012 at 11:26 AM
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    colinb17

    colinb17 If at first you don't succeed, don't try skydiving

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    ^^^ when doing that, remove the valve core first. the purpose is not to inflate the tire, but rather reseat it on the rim. with the valve core in is where you risk blowing it and yourself up.
     
  16. May 2, 2012 at 1:22 PM
    #16
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Totally understood and duly noted.

    Just use any flammable aerosol?
     
  17. May 2, 2012 at 1:33 PM
    #17
    winL

    winL Well-Known Member

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    Nice tip... I knew there was more to it than to spray some fluid and just light 'er up!
     
  18. May 2, 2012 at 1:38 PM
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    BlueT

    BlueT Well-Known Member

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    Never ahd removed core since usually I pump air immediately after tire expands. (this is the trick)

    Now I have to admit whole process looks scary to somebody outside. Last time I was doing this my family refused to participate and was cowarding behind stone wall. :D
    So I had to spray carburetor cleaner ( no ether on hand), light up, then immediately grab air hose to pump air. I should mention I had cigg in my mouth .:p
    Anyway I had same truck with same tires and rims. Runned 15-18 PSI fine
     
  19. May 2, 2012 at 1:39 PM
    #19
    Speed Freek

    Speed Freek Turbo Meister

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    I run 15 psi on 15" WHEELS (NON BEADLOCK) using BFG Mud terain tires (KM2) 33x12.5. And I drive really fing fast, lol. Never lost a bead.
     
  20. May 2, 2012 at 1:40 PM
    #20
    valon5150

    valon5150 Well-Known Member

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    You really do not need NEARLY that much ether if you have a small on board air compressor (Oriellys $60 ones work). Hook it up to the tire and turn it on. Then maybe two or 3 light shots of ether on the bead and light. It is much less dangerous and works just as well.



    On topic. I run around 8-10 anytime i'm in serious wheeling conditions that is with 33X10.50X15. I have met a few guys recently that run about 4-5 without beadlocks and will probably be attempting that when I go wheeling with them next. They say they have had the sidewall stretched in where you can see the bead and it has held.
     
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