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Jeep: 50psi tire pressure???

  1. #1
    HAKSAW_CA
    Guest

    50psi tire pressure???

    Hey All

    My jeep has 31" General Grabber AP tires on it, the front was looking a bit
    low so I was filling it up and when I checked the tire it has it's maximum
    xxxx lbs at 50PSI....

    50PSI, is this correct? should I be butting that much air in these tires? a
    regular tires ran 35psi so I was suprized to see these take 50, just want to
    check it with you guys before I blow up a tire becuase it's overinflated....

    thanks



  2. #2
    Coasty
    Guest

    Re: 50psi tire pressure???

    What does it say on your door frame that is what you go by.

    --
    Coasty
    Semper Paratus
    (Always Ready)

    "HAKSAW_CA" <com> wrote in message
    news:com... 



  3. #3
    Robb
    Guest

    Re: 50psi tire pressure???


    that tire rating is for the maximum capacity for that tire under maximum
    load. Remember, it's not just a jeep tire. It's probably a small, or reg
    truck tire too. you should go off your listed door frame, but I've found
    that to be off slightly at times. if you don't have doors, it's in your
    owners manual as well. I think my 89 yj is like 28 or something like that.

    HAKSAW_CA wrote: 

    --
    Message posted via CarKB.com
    http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1

  4. #4
    Eric
    Guest

    Re: 50psi tire pressure???

    I would go by the tire pressure listed on the door and/or manual
    provided the tires are the tires that came with your Jeep from the
    factory. If they are larger than the stock tires, then go by the
    tire manufacturer. I put 50psi in my 31" swampers on my 97XJ
    when I'm driving on paved roads, and that is only because the
    ride is less bouncy...especially during the winter months when
    the road heaves up due to frost.

    G/L,
    Eric

    On Thu, 9 Jun 2005 17:24:02 -0400, "HAKSAW_CA" <com>
    wrote:
     


  5. #5
    YouGoFirst
    Guest

    Re: 50psi tire pressure???

    Put in the 50 PSI. I say that because it DOES NOT MATTER what anything
    other than the tire manufacturer recommends. The manufacturer has engineers
    that have taken the time to design the tire so that it will last as long as
    possible. You will destroy your tire if you alter that pressure too much.


    "HAKSAW_CA" <com> wrote in message
    news:com... 



  6. #6
    Tomes
    Guest

    Re: 50psi tire pressure???

    Do not put in the 50 psi. Don't do it. As another poster posted, that is
    for a maximum load on other vehicles. Here is what you can do to find the
    right pressure for you in your Jeep at your weight.

    Chalk up the tire and then drive it for a couple of revolutions on the
    driveway. The right pressure is the one where the chalk wears off evenly
    across the width of the tread. Easy as cake.
    Tomes

    "YouGoFirst" <com> wrote in message
    news:LIgqe.304580$ops.worldnet.att.net... 
    engineers 
    as 
    tires? 



  7. #7
    John
    Guest

    Re: 50psi tire pressure???

    The reason that your tire pressure is set at 50psi is that your tires have a
    thicker sidewall then what is found on your normal 32psi tire. Ergo you need
    the extra psi to make sure that the sidewalls are seated to the wheel rims.



    If your tire separates from the wheel rim the result will most likely chew
    the hell out of your tires sidewall. If this happens and your tire was under
    inflated at the time of the incident forget about getting any damages from
    the tire company, you weren't following the manufactures specs. In other
    words, it's your baby.



    Keep this in mind. Most tire/rim separations due to insufficient tire
    pressure occur during a turn at over 35 miles per hour. Ask yourself if this
    were to happen would you be to keep your vehicle upright let alone under
    control?



    Be safe, follow the manufactures specs.



    John Ernst







    "Tomes" <net> wrote in message
    news:hasqe.2631$news.atl.earthlink.net... 



  8. #8
    Tomes
    Guest

    Re: 50psi tire pressure???

    But that is not the recommended tire pressure it is the maximum pressure.
    Finding out the recommended pressure is not done by looking at the max
    rating on the sidewall.

    "John J Ernst" <net> wrote in message
    news:d8g8fm$n9i$netins.net... 

    need 
    rims. 
    under 
    this 
    is 
    the 
    evenly 
    long 

    it's 
    just 



  9. #9
    Drifter
    Guest

    Re: 50psi tire pressure???

    On Thu, 9 Jun 2005 17:24:02 -0400, "HAKSAW_CA" <com>
    wrote:
     

    Under normal loads, inflate tires according to the vehicle
    manufacturer's recommendations, NOT the maximum pressure listed on the
    sidewall. In any case, one should never exceed this maximum pressure.

    Supporting References...

    Car Talk
    http://www.cartalk.com/content/features/Summer-Driving-Tips/tires.html

    Enjoy the Drive
    http://www.enjoythedrive.com/content/?id=8748

    Pep Boys
    http://www.pepboys.com/learning_center/car_care/articles/tire_pressure.html

    Drivers.com
    http://www.drivers.com/article/354/

    Tire Industry Safety Counsel
    http://www.rma.org/tire_safety/tire_maintenance_and_safety/part_pressure.cfm

    and on and on and on...
    Drifter
    "I've been here, I've been there..."

  10. #10
    Eric
    Guest

    Re: 50psi tire pressure???

    On Sun, 12 Jun 2005 04:37:45 -0400, Drifter <com>
    wrote:
     
    This would hold true for tires mounted on a vehicle at the factory.
    Your recommendation goes out the window when you change tires such as
    different tire brand, type of tire, size of tire, etc. When this
    happens, you go from the vehicle manufacturers recommended psi rating
    to the replacement tire manufacturers recommended psi rating. Case in
    point, my 97XJ came with Goodyear Wrangler 225/75R/15 tires from the
    factory. Psi rating was I believe 35psi on the side door. I swapped
    them out 6 months later with Cooper Discover 235/75R15 tires. If I
    had stuck with Jeep/Goodyears recommendation of 35 PSI, then I would
    have worn out the Cooper tires in 6 months provided I hadn't lost
    control at normal highway speeds first because at 35 psi, the coopers
    are underinflated! I would also have gotten pittiful mpg during the
    short life of the tire as well.
    I have 31" swamper TSL's on the XJ, and I keep them aired up at
    45-50psi. This is my second set. The first set lasted 4 years
    keeping them at 45-50psi and 95% of my driving was on asphalt/concrete
    pavement (i've got a 50 mile daily round trip to/from work). Must be
    doing something right.
    The best bet is to contact the tire manufacturer to find out THEIR
    recommended psi for the specific vehicle you plan on puting their
    tires on.

    Eric
    97XJ Sport 120k miles w/31" swamper TSL's
    92XJ Laredo 250k miles w/31" swamper TSL's

     



 

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