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Thread: Recommended Tire Pressure

  1. #1
    Registered stevegoff's Avatar
    Join Date
    Mar 2007
    NW Ohio

    Default Recommended Tire Pressure

    My GC came with 235/65R16 tires on it. I would usually keep around 35 psi in the tires. I recently changed them out for a set of A/T tires. The new size is 245/65R17. It's a slightly bigger tire and the sidewall says it has a max psi of 44. The tire shop that put them on only put 33 psi in them and said that's what the manufactuer recommended for this size. Those of you that have this size, what psi do you usually run. thanks in advance.
    2006 Grand Cherokee Limited-5.7L Hemi-Brute Force CAI-Magnaflow 22" Muffler-Diablosport Predator-SRT8 Rear Sway Bar-Bilsteins-Shorty Billet Antenna-Chrome Turn Signals-Chrome Tow Hooks-Roof Rack-SS Ultras Highs/Lows/Fogs-Commander Shift Knob-20% Tint

  2. #2
    Join Date
    Sep 2004
    Glen Allen, VA


    I have the 245/65R17 from the factory and the door says 33 psi so the tire shop was right.
    98 Sport TJ 4.0L
    Chile Pepper Red with Black Dual Tops
    31" BFG A/T

    05 Grand Cherokee WK 3.7L
    Bright Silver Metallic Clear Coat
    245/70/R17 Bridgestone Revos

  3. #3
    Registered robpp's Avatar
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    Sep 2007



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  4. #4
    Registered racer125's Avatar
    Join Date
    Jun 2007
    St. Louis, Mo. USA! In God We Trust


    If your WK came with the 235/65s, you may want to have the dealer change the tire size in the computer. The 245/65/17 is a larger (OEM) size that you can update. This will help with any speedo and shift point differences. They will be minor, but you may as well correct them. ( That way, your WK is squared-away)

    Recommended tire pressure can be found on your front driver door on just about any automobile.
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  5. #5
    Join Date
    Dec 2007
    east tn


    I take the door recomended pressures as a starting point.

    I am currently at 42psi and very happy.

    I felt that the door recomended pressure was too low and let the tire move too much.

    I am watching for odd tire wear but since I tend to tow or haul with my jeep I figure everyone just has to adjust tire pressure for how they use the jeep.

    I don't know what the weight of the crd is compared to the gassers but maybe that has something to do with it as well.

  6. #6
    Senior Moderator Virgil's Avatar
    Join Date
    Apr 1999
    Inside the Blue Light


    I keep my LTX M/S tires @ 35 psi (cold); so far there have been no problems with abnormal wear, poor ride/handling, or traction.

  7. #7


    I think 42 is way too high. Keep in mind, your tires heat up as you drive, therefor the pressure also rises. You may prematurely wear the tread. I usually keep them around 35.


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