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Tire Pressure

Discussion in 'Model S' started by scottflys, Apr 27, 2017.

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  1. scottflys

    scottflys Member

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    I have the 21's staggered on my MS 2016/2017
    What is the recommended pressure in the front and back. So many conflicting answers.
    Tesla says 41 all the way around.
     
  2. JPUConn

    JPUConn Member

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    Likely only adding to your confusion... In 2014 the answer was 42 on a loaner P85D with 21 Staggered but the display read 44 when cold.

    IMG_4166.JPG
     
    • Like x 1
  3. Knightowl

    Knightowl Whovian

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    21's are 42psi
    19's are 45psi

    however the actual pressure varies by 9psi depending on temperature and elevation changes from what I have observed.
     
  4. ig_epower

    ig_epower Member

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    I have 21" staggered in the summer and 20" in the winter. I put in 45 PSI on both sets (front and back). My rationale is the summers have a very short sidewall and I want to give the tires a fighting chance when I hit an unintentional pot hole. In the winter, the weather in Canada can get pretty cold (-10C) so the increased pressure doesn't hurt. I am still well below the maximum cold temp pressure and I have not noticed any accelerated tread wear as a result.
     
  5. scottflys

    scottflys Member

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    as I figured, the numbers are different depending on who you ask
     
  6. EVCarGUy

    EVCarGUy Member

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    Of course. So, don't ask. Look at the sticker on the door jam of your car. That's the official answer from the company that built your car. Anonymous "experts" on the internet will have dozens of reasons why that's wrong. But, it's the correct value.
     
    • Like x 3
  7. davidc18

    davidc18 Active Member

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    Agree that you should go with Tesla's recommendations.
     
  8. SomeJoe7777

    SomeJoe7777 Marginally-Known Member

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    Follow EVGarGuy's advice ... go with the door jam pressure settings unless you have a very good reason not to.
     
  9. ewseidler

    ewseidler Member

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    I would go with Tesla's recommendation, and remember the firmer the tire the less rolling resistance, so better milage. I always keep my tires at the recommended pressure or a pound or two more, unless your in very hot weather.
     
  10. Madtomboy

    Madtomboy New Member

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    Just had arachnids fitted and SC said 45psi front and rear. 245/35r21 Michelin super softs. Makes sense as low pressure warning kicks off at <42psi.
     
  11. Decibelle

    Decibelle Member

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    Location:
    Vancouver, BC 2015 P85D
    on the door jamb in my 2015 P85D it says 50psi but the service center always leaves the tires at 42psi when I have been in for service. I keep forgetting to ask them but will try to remember when I change my tires in a few weeks.
     
  12. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Whenever your car is serviced (regardless of the reason), always check the tire pressure the next morning. For one thing, the tires are likely to be warm when they are serviced, which leads to poor pressures--regardless of what they set it at during the service. Tire pressure should always be adjusted before driving, first thing in the morning. So it really doesn't matter what they set it to, because you're going to change it the next morning anyway.
     
  13. kort677

    kort677 Active Member

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    there will be variations on the TP based on the climate, in cooler climates you will lose a few pounds of TPI. when the tire get warmed up the TP will increase. the numbers in your cars doors stickers is a baseline.
     
    • Like x 1
  14. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Correct. Which is why you check your pressures in the morning, and adjust them from the vehicle placard pressure to suit your conditions.
     

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