Tire pressures

Discussion in '3rd Gen - 2007 - 2017' started by 16plati, Jun 24, 2019.

  1. 16plati

    16plati Full Access Members

    Age:
    29
    Posts:
    936
    Likes Received:
    281
    Joined:
    Mar 22, 2019
    Location:
    VA
    who here runs max tire pressures? Doesn’t matter if it’s lifted or stock, just curious as to how many people run the max pressures for whatever tires you are using
     
  2. JExpedition07

    JExpedition07 Ultimate Member Supporting Member

    Posts:
    4,069
    Likes Received:
    1,554
    Joined:
    Mar 30, 2017
    Location:
    New York
    I run 40 psi on my Michelins, not sure what max pressure is though. It says 35 PSI on the door jamb as recommended.
     
    ynpmoose likes this.
  3. powerboatr

    powerboatr Full Access Members

    Posts:
    875
    Likes Received:
    312
    Joined:
    May 16, 2016
    Location:
    North East Texas
    40
    38 out back
    rears stay at 38 unless we are towing the trailer with max tongue weight
     
    LokiWolf likes this.
  4. LokiWolf

    LokiWolf Full Access Members

    Posts:
    1,066
    Likes Received:
    515
    Joined:
    Apr 2, 2016
    Location:
    Richmond VA
    Max pressure is only for when you are running at or close to max tire capacity.


    Sent from my iPhone using Tapatalk Pro
     
  5. MuddySpokes

    MuddySpokes Active Member

    Posts:
    42
    Likes Received:
    16
    Joined:
    Oct 23, 2018
    Location:
    There & Here
    On my tires, max is not stated on the sidewall.

    When towing, I do start with the rears just under or at MAX COLD when cold.

    Even when empty, there is no noticeable difference to taking them down to lower pressures. Am sure there is some scientific test out there that will show a difference of X inches or X feet stopping distance though. YMWV.

    Also, am sure that there are plenty of ways that different people manage their tires. So, in this case, am not looking to claim which approach is best and am merely answering the original question ;)
     
  6. TobyU

    TobyU Full Access Members

    Posts:
    1,156
    Likes Received:
    398
    Joined:
    Apr 5, 2013
    Location:
    Ohio
    Are they mud tires?? Please show a pic of a DOT street tire that does not state max pressure, load range, and traction, tread wear, DOM etc on it.
     
  7. TobyU

    TobyU Full Access Members

    Posts:
    1,156
    Likes Received:
    398
    Joined:
    Apr 5, 2013
    Location:
    Ohio
    ALL tires that say 35 max get 35 or at least 34 if I'm in a hurry.

    All 44 tires get 42-42.
    All 50 tires get 42-45.
    Any 55 tires get 44-45 or so.
    All 60 get 55-60.
    All 80 get at least 72. Since all my E range tires are on big vehicles and carry lots of weight.

    I have had tire shops put a brand new E range on and put 35 in it.
    That wouldn't even be safe on one of my 14,400 GVWR vehicle!!!
     
  8. MuddySpokes

    MuddySpokes Active Member

    Posts:
    42
    Likes Received:
    16
    Joined:
    Oct 23, 2018
    Location:
    There & Here
    Step into the world of LT's. It is common to see MAX COLD which is not MAX. ;)
     
  9. Dr0idattack

    Dr0idattack Active Member

    Age:
    45
    Posts:
    40
    Likes Received:
    14
    Joined:
    Jun 4, 2018
    Location:
    Bentonville, AR
    Running 80 right now because of some recent towing. But I plan to go to 65 in a bit.
     
  10. LRNAD90

    LRNAD90 Full Access Members

    Posts:
    82
    Likes Received:
    37
    Joined:
    May 29, 2018
    Location:
    Maryland
    Since this is an enthusiasts community, and many people are running non stock tires, its probably helpful to also state the tire size, construction (P, P-Metric, LT) and load ratings. LT tires, for instance, will often run higher pressures than equivalent size in a P-Metric, to achieve the same load rating. Generally conversion tables can be found on the tire manufacturers websites..

    But yes, according to the tire manufacturers anyway, maximum stated cold inflation pressures are for when the tire is expected to carry at or near its maximum stated load capacity, and can and should be decreased to match actual load carried for best results.

    Here is an article pulled from Toyo's website as an example..

    https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf

    Keep in mind this example is for a specific brand and model tire, but it gets the point across..
     
    Last edited: Jun 26, 2019
    LokiWolf likes this.

Share This Page