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285/75/16 hankook dynapro atm PSI

Discussion in 'Wheels & Tires' started by Detective_Dan, Feb 27, 2011.

  1. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    i recently installed my 5100's and new wheels and tires, hankooks. i went to get a front end alignment to fix the camber on the front wheels. the guy who did my alignment comes in the waiting room and says to me, "you know you only have 35 psi in those tires right? they are rated at 80 psi. your gonna wear them down fast if you dont have enough psi in them so im gonna put them at 80psi"


    i said ok. the only problem with that is it rides like i have no suspension at all because the tires are rock hard now.

    i know my truck is not that heavy compared to chevy, dodge, and ford full size trucks that also use these tires.



    so my question to you is...........


    HOW MUCH PSI SHOULD I BE RUNNING!!!!???????!?!?!??!??!
     
  2. MontanaTaco

    MontanaTaco Well-Known Member

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    Don't run 80 psi! Do a chalk test to figure out the right psi. I run my nitto trails grapplers at 35/38.
    Oh and the guy who told you to run at 80 because you will wear them down is an idiot. The owner of my truck before me had his tires at 60 and they wore really badly.
     
  3. KPT

    KPT sees what you did there.

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    80 PSI!?!?!?! AHHHHHH go deflate those things back down to somewhere in the 30's!!!

    NEVER take your truck to that shop again!
     
  4. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    thats what im saying. i know 80 is way to much for a 4500lb truck. wtf is a chalk test though. can someone provide a link
     
  5. MontanaTaco

    MontanaTaco Well-Known Member

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    Take a piece of chalk and run a line on your tires then drive in a straight line for about 50 ft or so. Check to see how evenly the chalk wore off. It should be uniform across the tire. If its not fill or in your case deflate to where it is unifom.
     
  6. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    ok so run it along the width of the tread.

    never heard of that one before. ive done water to check how the tread is pressing on pavement, but never chalk
     
  7. KPT

    KPT sees what you did there.

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    I'm sorry for yelling Jason, I got a little upset @ the technician there :eek:
     
  8. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    ZOMG!!!!!!!!KEITH IS GONNA SHOOT MEEEEE!!!!!
     
  9. MontanaTaco

    MontanaTaco Well-Known Member

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    Yeah I heard it on here and tried it out. It works pretty good.
     
  10. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    apology accepted haha
     
  11. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    ok so obviously if there is still chalk on the outer part of the tread, there is too much psi?
     
  12. malander

    malander That's some tight butthole

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    You shoulda been like " oh yeah my bad you may as well take it to 100 since they'll deflate some with cold temps" and then watch him blow your tire up hehe
     
  13. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    no cause im pretty sure he would have died hahhahah
     
  14. Fienoma

    Fienoma Well-Known Member

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    x2 on the chalk test..2 years ago the idiots at costco set my 265 BFG A/Ts at 65 psi..always check the psi yourself..that way you know its done right
     
  15. malander

    malander That's some tight butthole

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    Maybe he deserved it for believing they needed to be at 80 FRICKEN PSI. I kid I kid, but in all seriousness go back and tell him to quit his job
     
  16. KPT

    KPT sees what you did there.

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    I'm going to shoot the guy who told you to put the 80 psi in there....
     
  17. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    he didnt tell me to do it, he did it.
    it was 8:00 in the morning, i had been drinking untill almost 4:00am that morning, and my brother randomly showes up from florida that morning at around 5:30 so i was kinda out of it. when he said im puttin 80psi in there i was like ya ok haha
     
  18. KPT

    KPT sees what you did there.

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    I wonder how many people near you are running 80 psi in their tires because of that guy.
     
  19. Detective_Dan

    Detective_Dan [OP] Bam-Ba-Lam

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    probably too many. ill drop the psi to around 35-38 tommorrow morning before work and they will be back to normal because thats what discount tire put in them when they were mounted
     
  20. David K

    David K Well-Known Member

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    I had Cooper STTs on my '05... 3 ply sidewall LT tire, and 40 psi was good on it... 32 psi was too squishy feeling.

    I have the Dynapro ATMs, but the P rated (44 psi Max.) and 35 psi feels good on them.

    The stock Rugged Trails (P rated) are the ones you read the door jam PSI for (29 front and 32 rear)... 35 psi max. on them!

    The chalk test is GOOD ADVICE!
     
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