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Tire pressure

Discussion in '3rd Gen. Tacomas (2016-2023)' started by kanelakos, Dec 27, 2015.

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  1. Dec 27, 2015 at 5:11 AM
    #1
    kanelakos

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    kanelakos [OP] Well-Known Member

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    IMG_20151227_075937793.jpg IMG_20151227_075031409.jpg Just got my '16 Sport yesterday. With the tech pkg, I noticed my tire pressures were all 35-36 psi when manual says cold psi @ 29. Any others notice this with their truck? Reduced pressure to 30 psi this morning.
     
    Last edited: Dec 27, 2015
    kanelakos, Dec 27, 2015
    #1
  2. Dec 27, 2015 at 5:19 AM
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    Farmcat

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    Farmcat Well-Known Member

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    Most dealers don't employ their top techs to do the pre delivery inspection. PDI's. Usually just cheap air pressure gauges that they use. I always check my pressure after any service. Love the tire by tire readout in my Tacoma now.
     
    Farmcat, Dec 27, 2015
    #2
    TOMRR and kanelakos[OP] like this.
  3. Dec 27, 2015 at 5:58 AM
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    gsxxr

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    gsxxr Well-Known Member

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    Was it much colder in the am?

    The expands and contracts with temperature. As you drive and tires heat up you can see the psi increase.
     
    gsxxr, Dec 27, 2015
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  4. Dec 27, 2015 at 6:05 AM
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    Farmcat

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    Farmcat Well-Known Member

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    Even with the cold weather here they do still increase 2-3 psi after driving a while. Again love the readout. Good Point gsxxr :thumbsup:
     
    Farmcat, Dec 27, 2015
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  5. Dec 27, 2015 at 6:07 AM
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    Aussiek2000

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    Aussiek2000 Well-Known Member

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    you'll get better mileage at the 35psi
     
    Aussiek2000, Dec 27, 2015
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  6. Dec 27, 2015 at 6:07 AM
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    TMMIgirl

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    TMMIgirl Well-Known Member

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    mine says 35-36 too. Should we let some air out?
     
    TMMIgirl, Dec 27, 2015
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  7. Dec 27, 2015 at 6:10 AM
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    Farmcat

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    Farmcat Well-Known Member

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    That's where mine is after driving. I start at 32psi cold.
     
    Farmcat, Dec 27, 2015
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  8. Dec 27, 2015 at 6:18 AM
    #8
    mello03

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    mello03 Dr. Dirty

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    Im not sure why so many people seem to only care about getting the best MPG and running overinflated pressures. Yeah great mileage saves some coin, but you're compromising the contact patch, performance, ride, and longevity to get a little bump in economy. Not worth it IMO. Run the pressures on the door, or chalk test the tires if you want the best pressure.
     
    mello03, Dec 27, 2015
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  9. Dec 27, 2015 at 6:22 AM
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    nra4usa

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    nra4usa Well-Known Member

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    So far, just a Hard Hat tonneau cover. Looking for mud guards and nerf boards.
    My dealer filled the tires with nitrogen. There is only one place in 25 miles to get nitrogen when needed. Guess where? Yep. The dealership. I'll use plain air, which is mostly nitrogen anyway.
     
    nra4usa, Dec 27, 2015
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  10. Dec 27, 2015 at 7:37 AM
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    kanelakos

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    kanelakos [OP] Well-Known Member

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    both pics were taken this morning within a few minutes of each other. Temp in high 40's. No driving since last night. Even the psi stickers in the door say cold psi @ 29. It seems strange to me.
     
    kanelakos, Dec 27, 2015
    #10
  11. Dec 27, 2015 at 7:39 AM
    #11
    CusterFan

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    CusterFan Well-Known Member

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    No but I guess it is a personal preference deal. I run 35PSI in mine.
     
    CusterFan, Dec 27, 2015
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  12. Dec 27, 2015 at 8:05 AM
    #12
    Markc1024

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    Markc1024 Well-Known Member

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    Also verify with an accurate tire pressure gauge. I've tested several different gauges and my dash reads about 4psi lower than those.
     
    Markc1024, Dec 27, 2015
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  13. Dec 27, 2015 at 8:12 AM
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    Farmcat

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    Farmcat Well-Known Member

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    My Snap-On Bluepoint gauge is spot-on with the dash readout
     
    Farmcat, Dec 27, 2015
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  14. Dec 27, 2015 at 8:30 AM
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    CusterFan

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    CusterFan Well-Known Member

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    CusterFan, Dec 27, 2015
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  15. Dec 27, 2015 at 8:37 AM
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    RD52

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    RD52 Well-Known Member

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    The advantage of nitrogen isn't really the nitrogen part, but the fact that there's no water vapor in it.
    [GEEKMODE=ON]
    The gas in any closed volume will increase in pressure as the temperature rises. At normal temps, most gases, nitrogen and oxygen included, closely follow the ideal gas law, PV=nRT. That means a 50° temperature change will result in about a 10% change in pressure. Water vapor though doesn't follow the ideal gas law closely at all, and changes pressure much more in proportion to the the temp change, with the effect being strongly non-linear and more marked at higher temps.
    However, in the real world, at the kinds of temperatures you'll typically see in street use, the overall effect is still small and not worth worrying about.
    [GEEKMODE=OFF]
     
    RD52, Dec 27, 2015
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  16. Dec 27, 2015 at 8:51 AM
    #16
    TacoGlenn

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    TacoGlenn Nobody Makes a Monkey Outta Me!

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    yes, I also bumped mine up to 35 psi for improved mpg
     
    TacoGlenn, Dec 27, 2015
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  17. Dec 27, 2015 at 8:53 AM
    #17
    Aussiek2000

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    Aussiek2000 Well-Known Member

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    My truck doesn't get shit for mileage and has non-stock tires. But 35f/32r seemed to help a little
     
    Aussiek2000, Dec 27, 2015
    #17
  18. Dec 27, 2015 at 10:15 AM
    #18
    splitbolt

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    splitbolt Voodoo Witch Doctor

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    Stock tires or OEM sized tires with similar load rating, run the placard.
    Realize also, that a 1.1 correction is mandated on P tires used in light truck applications.

    Also if you change tire size and/or go from P to LT, correction factors apply.
     
    splitbolt, Dec 27, 2015
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  19. Dec 27, 2015 at 10:20 AM
    #19
    Z50king

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    Z50king DCLBOR4X4FTW

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    I'm sticking with 35 psi of AMBIENT AIR. Anyone who fills with nitrogen is a rich idiot
     
    Z50king, Dec 27, 2015
    #19
  20. Dec 27, 2015 at 10:21 AM
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    nra4usa

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    nra4usa Well-Known Member

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    So far, just a Hard Hat tonneau cover. Looking for mud guards and nerf boards.
    Agreed.
     
    nra4usa, Dec 27, 2015
    #20
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