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Best on-road tire pressure for LT tires?

Discussion in '3rd Gen. Tacomas (2016+)' started by Black64, Jul 9, 2020.

  1. Jul 9, 2020 at 1:03 PM
    #1
    Black64

    Black64 [OP] Lowes/Home Depot Crawler

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    It's a silly question but I can't find anything on google or searching these forums. Just upgraded to new Falken Wildpeaks 265/75R16 (LT, 123 load index, 80 PSI max) and the tire shop filled them to 35 PSI, I have them currently at 65 PSI. Is this good for on-road or should I run them higher or lower? I am averaging 21 MPG currently.
     
  2. Jul 9, 2020 at 1:05 PM
    #2
    15ACOR

    15ACOR Well-Known Member

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    Jesus, 65 psi must be like driving concrete blocks that are about to explode
     
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  3. Jul 9, 2020 at 1:08 PM
    #3
    Black64

    Black64 [OP] Lowes/Home Depot Crawler

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    It's actually about the same as the stock firestones, I ran them at max 44 PSI. My highway MPG is excellent, often hitting 23.
     
  4. Jul 9, 2020 at 1:12 PM
    #4
    su.b.rat

    su.b.rat Tacomakart

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    you can do whatever you want, those tires can hold a lot. but if you're asking about tire function like grip, life, handling, etc, then the answer is obtained through a chalk test. every truck is different with weight. but if you want to run them at 80psi for added mileage then just do it. and then save for some new teeth.
     
  5. Jul 9, 2020 at 1:19 PM
    #5
    Mr.Hustler

    Mr.Hustler Well-Known Member

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    It's a secret
    You're likely going to prematurely wear out the center most 3-4" of your tire tread with PSI higher than 45...
     
  6. Jul 9, 2020 at 1:21 PM
    #6
    Pilsner

    Pilsner Well-Known Member

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    Chalk test isn't perfect. Mine showed about 35 for full contact, but that showed abnormal tread wear. 38 or just above cold is what is wearing best for me. I am on 255/85r16 ST Maxx.
     
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  7. Jul 9, 2020 at 1:25 PM
    #7
    0xDEADBEEF

    0xDEADBEEF Well-Known Member

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    With radial tires the tire pressure has far less effect on the profile of the tire, so the chalk test isn't very useful, and you're unlikely to wear out the center of the tire faster.

    The pressure listed on the door jamb is probably the best mix of ride quality and efficiency for a stock vehicle. Add weight (or tow), and it might be worth reconsidering.

    Speed and weight-of-foot have more to do with your gas milage, unless your tires are just that flat.
     
  8. Jul 9, 2020 at 1:27 PM
    #8
    vicali

    vicali Chilling at YMH

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    Phew, no wonder the anti E-load guys think they are rough..
    I run my 265/70-R17 E Toyo RT at 38psi, when they warm up they get to around 44psi on the highway..
    When I hook up the trailer and tow I'll boost it up to 50psi.
     
  9. Jul 9, 2020 at 1:28 PM
    #9
    gudujarlson

    gudujarlson Well-Known Member

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    I’ve not gone as high as 65psi. Do you still have all your teeth?

    I’ve experimented between 30 and 40 psi. 40 felt like a dump truck compared to the stock tires at 32. 35 has been a happy medium. I’ll try 65 and tell you what I think.
     
  10. Jul 9, 2020 at 1:33 PM
    #10
    splitbolt

    splitbolt Well-Known Member

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  11. Jul 9, 2020 at 1:36 PM
    #11
    127.0.0.1

    127.0.0.1 AKA ::1

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    35 all around is a good generic rule for tacoma and 4runner and sienna

    I run 38 typically but recently went to 35 all around since hitting a more rotted out connector
    road on my commute...a few lost psi does smooth out rumbles a hair
     
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  12. Jul 9, 2020 at 1:39 PM
    #12
    hiPSI

    hiPSI Laminar Flow

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    There is no "best" inflation for on road use of LT tires. Dude, the tire is designed to hold weight and not deform, so if you don't have any weight, then you can run a low pressure. Don't hand me a crock of shit telling me your E tire rides as good as a P tire either. They don't. They can't physically.
     
  13. Jul 9, 2020 at 1:45 PM
    #13
    127.0.0.1

    127.0.0.1 AKA ::1

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    ^this

    my generic rule of 35 all around is on ordinary LT Michelins LTX Defenders and mostly empty trucky

    if I am hauling excess weight like 1000 lbs them pressures are going to MAX
    and if I am hauling weight all the time not just a few times (a real work truck)
    then I get better truck tire rating (with a worse unloaded ride)
     
  14. Jul 9, 2020 at 1:50 PM
    #14
    Dirk Diggler

    Dirk Diggler Under the Stun Gun

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    Chalk test
     
  15. Jul 9, 2020 at 2:18 PM
    #15
    su.b.rat

    su.b.rat Tacomakart

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    I'ma say my 30" E tires ride amazingly better than any bubblegum P or LT rated cheesy crap. 35psi here. these tires are like driving on rocks even medium low pressure.
     
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  16. Jul 9, 2020 at 2:25 PM
    #16
    Marshall R

    Marshall R Well-Known Member

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    80 PSI is intended for a fully loaded 3/4 ton or 1 ton truck with a GVWR over 10,000 lbs. You wouldn't even put that much air in a 3/4 ton truck unless you were hauling near max. Most guys with 3/4 tons run 50-60 PSI for normal driving.

    The wheels on your Tacoma aren't rated for over 65 PSI, you stand the chance of splitting your rims with that much air in them.

    The tires that came on the truck call for about 30 PSI for best ride and 44 PSI for max hauling. I always ran closer to 40 PSI with those tires.

    But the E series tires are stiffer and don't need as much air to carry the same weight. Around 30 PSI is a good place to start for best ride. If you're going to haul any weight then closer to 35 PSI. No reason for more than that in a Tacoma.
     
  17. Jul 9, 2020 at 2:30 PM
    #17
    Marshall R

    Marshall R Well-Known Member

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    I had to run 40-44 PSI with the P rated tires in order to safely haul any real weight in my Tacoma. With the E rated tires I can run them at 30-35 PSI and still haul the same weights. At those air pressures there is no difference in ride
     
  18. Jul 9, 2020 at 2:34 PM
    #18
    gudujarlson

    gudujarlson Well-Known Member

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    I agree with most of what you said, except for the risk and of splitting the rim at 65psi. I’m skeptical about that because I routinely put 100+ psi in my bicycle tires.
     
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  19. Jul 9, 2020 at 2:41 PM
    #19
    salty taco

    salty taco Distinguished Member

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    I just got new ridge grapplers 265/75/16 and the tire shop had them at 40 psi. The ride felt very rough so I aired down to 32 and it feels much better now.
     
  20. Jul 9, 2020 at 2:42 PM
    #20
    coopcooper

    coopcooper certified youtube mechanic

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