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What tire pressure while towing?

Discussion in 'Towing' started by Boltsfaninmo, Apr 21, 2013.

  1. Apr 21, 2013 at 8:03 AM
    #1
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    I checked the owners manual and couldn't find anything. My 4x4 DCSB tire pressure is normally 29psi. Should I add more air while towing? I'll be towing around 4500 to 5000 lbs.
     
  2. Apr 21, 2013 at 3:51 PM
    #2
    Tacoyota

    Tacoyota senile member

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    North of Cali, South of Canada
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    4.56 gears, rear trutrac,DT header, 235/85r16 Duratracs, 2nd filter pulled, inter.wipers, Cruise control, Factory alum. whls/winter tires(2nd set), Afe pro Dry-S , Dumbo eared flaps cut down.
    Check the tire pamphlet in with the owners manual. Add some air to the rear, its a hit n miss game of what the tire maker says vs the tongue weight + bed cargo. If your tire goes to 40 psi for example, try 32-36 loaded.
     
  3. Apr 27, 2013 at 8:05 PM
    #3
    03stepsidetaco

    03stepsidetaco Member

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    with this much I'd max out the tires. look on the sidewalls it will say
    max load @max psi. go with that.
     
  4. Apr 27, 2013 at 8:15 PM
    #4
    TACO TX

    TACO TX Well-Known Member

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    i wouldn't run no less than 32 or so all the time. I run 34 in front and 32 in rear most of time. ill be towing my boat alot now so 34 in rear also w/P-metric. That much weight you probaly need to look at a LT tire. Maybe a three quarter ton. Thats alot of weight.
     
  5. Apr 27, 2013 at 8:30 PM
    #5
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    I picked up my toy hauler yesterday. I'll be using it this Friday. The max pressure on my OEM tires is 51 psi. I think I'll bump them from the 29 to 40 and see how it rides.
     
  6. Apr 28, 2013 at 8:16 AM
    #6
    03stepsidetaco

    03stepsidetaco Member

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    with "p" tires you'll want to max the psi out with 5k trailer load.
    like someone said you very well may need to move up to "LT" tires to get the stiffer sidewall.
     
  7. Apr 28, 2013 at 11:31 AM
    #7
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    Man I really hope I don't have to replace my perfectly good tires just to tow a few times a year. I really like the way the stock tires ride.
     
  8. Apr 29, 2013 at 6:29 PM
    #8
    ManMan

    ManMan Well-Known Member

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    Just check the load rating of your tires
     
  9. Apr 29, 2013 at 6:44 PM
    #9
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    I did and they are 110 which equates to like 2300 #'s or something like that. The good news is that is at the highest end of the scale per Tirerack's chart.
     
  10. Apr 29, 2013 at 7:16 PM
    #10
    ManMan

    ManMan Well-Known Member

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    Keep your rear-axle weight less than your tire rating and be happy with what you have for now.

    Also, check your tire pressure AFTER you've hooked up. The extra weight will increase the pressure and it still has to stay below the max sidewall pressure
     
  11. Apr 29, 2013 at 7:23 PM
    #11
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    Thanks, I picked up my trailer tonight from E-trailer who installed the brake controller an W.D. hitch. I drove home from E-trailer with the 29#'s I usually have in the tires. Felt really mushy and at 45mph and above I started to get trailer sway. It freaked me out enough that I exited the freeway and took surface streets home. After I got home I put about 40#'s in the rear and 37#'s in the front. I went for a short drive and could tell the truck handled better. I still got sway at speeds above 45 mph, so guess I'll need to install an anti sway bar to see how that helps. I'm sure a load in the rear of the toy hauler would help too.
     
  12. May 3, 2013 at 5:20 PM
    #12
    03stepsidetaco

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    no, just saying that if you end up at 51 psi and still don't like the "mush"
    that would be one thing to look at.
     
  13. May 13, 2013 at 5:05 PM
    #13
    Boltsfaninmo

    Boltsfaninmo [OP] Well-Known Member

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    I opted for a new truck. At the end of the day my Taco can't handle the tongue weight on my toy hauler. Airing up the tires did help, but the Taco just can' hang.
     
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