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Tire pressure

Discussion in 'Wheels & Tires' started by thomasr1950, Jul 26, 2009.

  1. Jul 26, 2009 at 3:10 PM
    #1
    thomasr1950

    thomasr1950 [OP] 16 Tacoma TRD Sport

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    On my door jam the sticker says 29psi cold or hot for my tire pressure. I have Bridgestone Dueler's H/T. I just had the 5,000 mi service, tires rotated, pressure checked & oil change. I reported vibration & ask for a road force balance to be done. The tires were balanced by the dealer about 2 months ago & i still had some vibration so i ask the other balance to be done. Why would the dealer inflate my tires to 37psi? What pressure are other owners with these tires have?
     
  2. Jul 26, 2009 at 3:18 PM
    #2
    Brunes

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    If they rotates tires- Check to make sure they are properly torqued...Over or under torquing can cause a vibration.

    Not sure why they would over inflate those tires like that. Best way to find the pressure for your tires on your truck is to put a chalk line across the tread, drive about 100 yds, and see where the chalk line wears. If it wears in the middle- too much pressure take some out. If if wears on the sides- too little air up. If it's even- Right on.
     
  3. Jul 26, 2009 at 3:23 PM
    #3
    luk8272

    luk8272 Poodoo

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    I love the chalk method. Just ask chris.
     
  4. Jul 26, 2009 at 3:37 PM
    #4
    Tacoyota

    Tacoyota senile member

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    the sticker is best all around driving, but more psi gets you better mpg ... to a point. more load = more psi too. My o.e.m.(stock dunlop at20) go to 51 psi , but the normal dunlop at20 is only 41psi max. Any way , i run mine in dry conditions a 42 psi (51 max on tire) unless im off road or snow. Chalk shows a little light on the outside.
    Beware, this kinda thread can really get hot!
     
  5. Jul 26, 2009 at 3:58 PM
    #5
    thomasr1950

    thomasr1950 [OP] 16 Tacoma TRD Sport

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    @ 37psi i'm getting a little rougher ride & my inside rear view mirror shakes where as before i didn't get any shaking in my mirror. I just checked the owners manual & it says 30 front 33 rear.
     
  6. Jul 26, 2009 at 4:14 PM
    #6
    Brunes

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    Over inflating your tires for better MPGs will get you a rougher ride- less rolling resistance but less compliance from the sidewalls.
    Conversely- Less air will make the tire more compliant (takes some of the shock of road roughness/obstacles) but it'll have more rolling resistance and lower mpg.

    Use the owner manual numbers if you don't want to do the chalk test....
     
  7. Jul 26, 2009 at 4:16 PM
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    Tacoyota

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    I wonder if it could be a driveshaft bent or missing a weight, sounds odd that a tire wont get out the vibration. My thought is go with the 30/33 you mentioned, 29psi if you want a smoother ride.
     
  8. Jul 26, 2009 at 4:41 PM
    #8
    Tacoyota

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    :eek:
    wow
    I'll Let my secret out, I do traffic maintainance, paint the road at 10mph. Snow and gravel roads are my specialty on my own time lol, but i suspect the same rollover rule apply there.
     
  9. Jul 27, 2009 at 10:07 AM
    #9
    coma09

    coma09 Senior Member. Hey, what's That supposed to mean?

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    on a cool day - not mid-day in Texas in the sun ....
    Inflate your tires to the recommended pressure before driving.
    Drive ~ 5 miles and recheck. Pressure should rise ~ 10% ..
    ie you were @ 30 cold, you should be about 33 warm.
    Underinflation, your tires will heat up more, and be higher pressure warm. Overinflated, = cooler, less pressure rise.
    Handy if you have different tires/wheels than stock. It's better to err on overinflation than under.
     
  10. Jul 27, 2009 at 1:43 PM
    #10
    Janster

    Janster Old & Forgetful

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    I ran my truck for a while (when it was new) at 29psi....and honestly? The truck felt really mushy. I didn't like it. I run mine at around 34psi.

    To me - it's a truck and its supposed to ride somewhat hard.
     
  11. Jul 27, 2009 at 2:36 PM
    #11
    Caddmannq

    Caddmannq MotoNerd

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    I do run 29 cold, around town here, in the summer. It's very hot on the asphalt & wnen hot the pressures probably go up 20%+.

    It's a truck, and if I'm gonna haul a real load I'll always add at least 5 or 10 psi. Particularly on the freeway.
     
  12. Jul 27, 2009 at 5:16 PM
    #12
    thomasr1950

    thomasr1950 [OP] 16 Tacoma TRD Sport

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    I checked my service receipt, dealer states road force balance was done, tech did not notice any vibration. Well it's still there. I drove my usual route to & from work, it's some better after the tires warm up. When the tires are cold both morning & evening it seems worse. I think it's a tire issue. Shouldn't the road force balance tell the tech that or is it just the balance of tires/wheels. This is the 2nd time i've been to the selling dealer on this. I'm thinking about having another dealer check it out.
     
  13. Aug 13, 2009 at 4:24 AM
    #13
    Janster

    Janster Old & Forgetful

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    Just thought I'd add...

    I'd been running 34psi in my stock Dueler H/T's for a couple years now.

    Since the tires have 19,000 miles on them and 1/4" tread left...I've been noticing the truck get tail happy in turns when the roads are just slightly wet.

    So - I dropped the psi down to 30psi to help with grip a bit.

    Looks like next year might be a time for some new tires!!!
     
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