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smokeylew's avatar
smokeylew
Explorer
Sep 23, 2018

Setting tire pressure before hitting the road

Getting ready to hit the road and want to set tire pressure on truck and trailer. Max load pressure on 5th wheel is 110 lb. I set tire pressure cold but should it be set first thing in morning or later when the day is warmer? Live in So Cal and day highs are in the 90's.

Measuring tire pressure in morning can be four or five degrees lower than measuring same tire in the afternoon. How would you set the pressure?

30 Replies

  • Ralph Cramden wrote:
    downtheroad wrote:
    Keep it simple.

    Set them to max pressure as stamped on the side walls of the tires. Do this in the morning before you start driving....and get on down the road.


    Trying to tell people something like that on this or other RV boards? That is hilarious.

    You get a lot of those who just have to complicate the uncomplicated on these boards for some reason. Tank sanitizing rituals, battery charging, tire pressure, greasing bearings, so on and so forth. Fun and entertaining reading however.
    Fun and entertaining because they're different from the way you do it of course. Good reading if they agree with you.
  • downtheroad wrote:
    Keep it simple.

    Set them to max pressure as stamped on the side walls of the tires. Do this in the morning before you start driving....and get on down the road.


    Exactly what I do. Never had an issue even if I left Canada in winter and went to Florida.
  • downtheroad wrote:
    Keep it simple.

    Set them to max pressure as stamped on the side walls of the tires. Do this in the morning before you start driving....and get on down the road.


    Trying to tell people something like that on this or other RV boards? That is hilarious.

    You get a lot of those who just have to complicate the uncomplicated on these boards for some reason. Tank sanitizing rituals, battery charging, tire pressure, greasing bearings, so on and so forth. Fun and entertaining reading however.
  • set pressure when tires are cold..not driving on and before SUN warms them up
  • downtheroad wrote:
    Keep it simple.

    Set them to max pressure as stamped on the side walls of the tires. Do this in the morning before you start driving ....and get on down the road.

    That's what I do. Hasn't been a problem thus far.

    Mike
  • Keep it simple.

    Set them to max pressure as stamped on the side walls of the tires. Do this in the morning before you start driving....and get on down the road.
  • The recommended pressures already have daily temperature fluctuations built in. No need to alter during the day.
  • Inflate to manufacturer’s specifications. Beware of the tire “experts” who believe differently cuzz they’ve towed a trailer for 30 years never had a problem.
  • I set mine to be correct for the approximate temp that I will begin towing. If cold at 7 am, much warmer at 3 pm, I adjust for my 10 am departure temp. Say tire pressure should be 80 psi cold, and 7 am temp is 40 degrees, but mid afternoon likely 75 degrees. I would set mine at 78 psi at 7 am temp, guessing 55 degrees, at my 10 am departure time will net 80 psi. Hope you understand, just my way, and works for me.

    Jerry
  • Cold inflation pressure is the inflation pressure of tires before the vehicle is driven and the tires warmed up.
    I set it depending on whether I'm after ride comfort, or fuel economy. Closer to recommended inflation pressure for ride, higher than that for fuel economy, without exceeding max cold inflation pressure.