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What psi should i run

Discussion in 'Wheels & Tires' started by Madams, Aug 25, 2011.

  1. Aug 25, 2011 at 9:14 AM
    #1
    Madams

    Madams [OP] Well-Known Member

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    What Psi should run in 33x12.50 duratracs mounted on 15x8 rims. On the outside of the tire has go a line about 1/4 or 1/2 an inch, where part of it dont touch the ground.
     
  2. Aug 25, 2011 at 9:16 AM
    #2
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    Do the chaulk test :cool:
     
  3. Aug 25, 2011 at 9:17 AM
    #3
    97yota4wd

    97yota4wd Well-Known Member

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    alot of metal, small engine, decent travel.
    caged, camburg long travel, 50t leafpack (soon to be installed) light rack over cab, 5pt harnesses etc
    i would run about 32psi.

    whats currently in them?
     
  4. Aug 25, 2011 at 9:19 AM
    #4
    Ridgerunner

    Ridgerunner Well-Known Member

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    What is the max recommended PSI on the sidewalls of your tires?
     
  5. Aug 25, 2011 at 9:21 AM
    #5
    97yota4wd

    97yota4wd Well-Known Member

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    alot of metal, small engine, decent travel.
    caged, camburg long travel, 50t leafpack (soon to be installed) light rack over cab, 5pt harnesses etc

    they are probably 50.

    but that doesnt matter, OP dont run over 38.
     
  6. Aug 25, 2011 at 9:25 AM
    #6
    Ridgerunner

    Ridgerunner Well-Known Member

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    Right I was going to suggest that because OP's truck is not that heavy. If max is 35, run 30-32psi. If max is 44, run 35-38psi and so on. Don't forget you need to put enough air in them to fully construct the tire.
     
  7. Aug 25, 2011 at 9:33 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    The only way to accurately determine the correct PSI is to use the chalk method.
     
  8. Aug 25, 2011 at 9:35 AM
    #8
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    Max pressure for any given tire has nothing to do with what you should be running in them. Max pressure for an E rated tire is probably triple what you would need in a Tacoma (some members are running E rated tires).

    Do the chaulk test, it's the best way to determine if you have the correct amount of pressure in your tires.
     
  9. Aug 25, 2011 at 9:39 AM
    #9
    Madams

    Madams [OP] Well-Known Member

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    how do you do the chalk test.
     
  10. Aug 25, 2011 at 9:39 AM
    #10
    97yota4wd

    97yota4wd Well-Known Member

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    chalk test is ultimatly the best way to find out what PSI you should be running. but if your like me.. im too dam lazy. lol
     
  11. Aug 25, 2011 at 9:44 AM
    #11
    Madams

    Madams [OP] Well-Known Member

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    Im asking how do you do the test? Never heard of it before
     
  12. Aug 25, 2011 at 9:48 AM
    #12
    Madams

    Madams [OP] Well-Known Member

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    OK just looked on side wall and the recommended psi was 35. Hadnt checked it with the pressure gauge cause I had one then one day i was using it, it broke on me. Going to go over to my buds house and check it over there.
     
  13. Aug 25, 2011 at 9:49 AM
    #13
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Well google is your friend.

    Ok get chalk and make a line across the tire. Make sure you can see it. I also marked a bit of the sidewall. Then drive on a flat, clean street. All you need is a few tire rotations then check the line. If the center part of the line is worn or missing you have too much air. If the sides are worn you don't have enough air. Repeat as many times to get an even wear pattern.
     
  14. Aug 25, 2011 at 9:52 AM
    #14
    Madams

    Madams [OP] Well-Known Member

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    thanks dude
     
  15. Aug 25, 2011 at 9:52 AM
    #15
    bakerla

    bakerla Man, Myth, Legend

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  16. Aug 25, 2011 at 12:35 PM
    #16
    Ridgerunner

    Ridgerunner Well-Known Member

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    FWIW Op my truck is pretty much the same as yours in weight. I have Michelin X's with a max sidewall recommendation of 35psi. I always run mine at 32 all around. You can do what you like-if you want better mileage, run 32-33psi. If you want a softer ride, 26-28psi is fine. At 32psi, my experience with these tires has been a nice mix of longevity mileage and ride. Just one man's method.
     
  17. Aug 25, 2011 at 12:36 PM
    #17
    Sport11

    Sport11 Well-Known Member

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    x2 on the 32 psi
     
  18. Aug 25, 2011 at 12:39 PM
    #18
    Ridgerunner

    Ridgerunner Well-Known Member

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    Where in my post did I say to use max pressure?????
     
  19. Aug 25, 2011 at 12:47 PM
    #19
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    Where in my post did I accuse of saying that? Your posts keep relating the max pressure to what should be run in the tires and you simply can not relate the two:

    "Right I was going to suggest that because OP's truck is not that heavy. If max is 35, run 30-32psi. If max is 44, run 35-38psi and so on. Don't forget you need to put enough air in them to fully construct the tire."

    The max pressure as indicated on the sidewall of the tire is simply how high you can inflate them to carry their max loading, it has nothing to to do with what you should run in the tires when unloaded for optimal tire wear.
     
  20. Aug 25, 2011 at 12:50 PM
    #20
    Ridgerunner

    Ridgerunner Well-Known Member

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    What do you call this spunky? My posts suggest to NOT run max. I only refer to max as a guidline. Got it? Probably not. Have your toy kid.
     
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