I was curious to know if any of you have the TPMS sensors on their trailer tires and what you have your warnings set at. Without getting into the debate of the ST/LT tire thing, I would like to know what your operating tire pressures and temps are when pulling loaded in summer months. Just looking for trailer tire info not TV. Currently I'm running the Maxxis 235/80/R16s so anyone with that tire/wheel setup would be great.

tinner12002 wrote:I was curious to know if any of you have the TPMS sensors on their trailer tires and what you have your warnings set at.The Newmar runs Michelins 22.5" X 10" that have a max pressure of 120 PSI. we set the warning at 115 PSI. the Toad has a max pressure of 80, we only run 45. so we set the pressure warning at 45.You really must run the TPMS for the day you are traveling and find the optimum pressure that will not over heat the tires, yet not so high that any heat will over pressurize the ties.WE found that 97 PSI cold will result in 105 PSI at running temps, it requires about 1 hour to come up to temp on a 80 degree day. The Toad never varies, set at 45 it stays at 45.Run your system see what it does, experiment with the pressure.

The tire pressure on my truck sure changes from summer to winter. The only sensors I have is built-in with the truck system. I get occasional alarms in the winter months before they warm up some going down the road. These alarms are not adjustable for me as far as I know.If I keep getting low pressure alarms I usually go ahead and re-fill to bring up the air pressure.Roy Ken

The TST system that we have recommends setting the alarms for 20% over and 10% under for the pressures. For ours the rear pressure is set to 80psi and will alarm at 72 for a low and 96. The front pressure is set at 65psi and it alarms at 59 or 78 for the high.The high temperature alarm was factory set for about 165 to 170 degrees F, which I did not change.Only once did we get a high pressure alarm, and that was while driving in the south, in summer. According to IR temp gun, the temperature of the road was about 125 degrees FKen

To answer this question right I have to write about the ST/LT thing a little.ST tires are calculated in their maximum load for more deflection.This cources more heat production so warmer inside tire temperature.But you can also give the tire a pressure a LT tire would need for the same load, so it gives lesser deflection and so lesser heat production.This all is to set the pressure on your TMPS.Then for colder outside temperature you need to set the lowest pressure before alarm to the pressure belonging to coldest outside temperature you asume to experiënce in your suroundings.Then you have to set the highest pressure for alarm to the pressure belonging to boiling point of water so 100degr C/ <> 200 degr F.This temperature the inside tire can get incidentially by severe braking. Then the heat of the brakes is transported trough the rimms to the tire inside. This can happen when descending in the mountains and using the brakes to often, and then its anoing and not good for your concentration if an alarm keeps going off.the tire and valves can stand this higher pressure , they are tested for that and even testing standards for that.If you give data of trailer and tires I can calculate the needed pressure and give the pressures the tires will have at coldest and at hottest, so you can set your borders to that.

WOW, that is a lot of thinking. I adjust the pressure before I head out in the mornings and have never had a problem before I set down for the evening. Yes the pressure increases when the tempos are hotter, but under normal circumstances that would not cause an alarm to go off.

Tire pressure and temps while towing | Good Sam Community

lincster
Explorer
Dec 18, 2014
jadatis wrote:
No but thats not important for the determination of tire pressure advice or how the temperatures in the tires variate .

Actually it is. Toyhaulers are heavy and hard on tires.
ST tires don't belong on any toyhauler bigger than 24'.
tinner12002
Explorer
Dec 18, 2014
Appreciate all the replies as they pretty much answered my ques.
jadatis
Explorer
Dec 18, 2014
No but thats not important for the determination of tire pressure advice or how the temperatures in the tires variate .
lincster
Explorer
Dec 17, 2014
jadatis wrote:
To get this on topic again, an ST tire will get hotter inside tire temperature when driving for instance 50 to 60 m/h then an LT tire.
This is because of more deflection when using pressure determined by the lists tire makers give.
Normal temp warm for LT tire when driving that speed will be about 112 degr F. An ST tire will get a warmer inside tire temp when driving that speed because of the more deflection .
This brings an ST tire closer to the border where damage begins and thats the reason why ST tires give more blow outs .

Same we had in Europe with Travel trailers, wich had OEM tires Normal car tires ( P-tire B-load ) and rule was 10% extra maximum load when using 10% above maxloadpressure of 36 psi so about 40 psi.
Maximum allowed speed then was 100km/62m/h.
To law in the Netherlands and many European country's max speed was 80 km/50m/h later highened to 90km/55m/h only on the highway.

Because of overloading,because of more luxuary build in , this gave often blowing tires .

Many cheap tires got a bad name by that affaire,thoug the real cource was the wrong use of the tires, so overloading and higher speed on the french roads.

Do you even know what a toyhauler is?????
Macman83
Explorer
Dec 16, 2014
As a quick comment, the OP wanted to know what pressures and temps you guys with the TPMS systems had. Maybe get back to that?
fly-boy
Explorer
Dec 15, 2014
Maybe its an opposites sort of thing from the Twilight Zone-

In the Europe dimension ST tires work- In the US dimension LT tires work-

Of course lots of things "work" in Europe that don't work over here!
coolbreeze01
Explorer
Dec 14, 2014
I do the touch/feel check on my tires. My truck tires always feel warmer than my trailer tires.
jadatis
Explorer
Dec 14, 2014
To get this on topic again, an ST tire will get hotter inside tire temperature when driving for instance 50 to 60 m/h then an LT tire.
This is because of more deflection when using pressure determined by the lists tire makers give.
Normal temp warm for LT tire when driving that speed will be about 112 degr F. An ST tire will get a warmer inside tire temp when driving that speed because of the more deflection .
This brings an ST tire closer to the border where damage begins and thats the reason why ST tires give more blow outs .

Same we had in Europe with Travel trailers, wich had OEM tires Normal car tires ( P-tire B-load ) and rule was 10% extra maximum load when using 10% above maxloadpressure of 36 psi so about 40 psi.
Maximum allowed speed then was 100km/62m/h.
To law in the Netherlands and many European country's max speed was 80 km/50m/h later highened to 90km/55m/h only on the highway.

Because of overloading,because of more luxuary build in , this gave often blowing tires .

Many cheap tires got a bad name by that affaire,thoug the real cource was the wrong use of the tires, so overloading and higher speed on the french roads.
allcool
Explorer
Dec 14, 2014
lincster wrote:
jadatis wrote:
My conclusion is the lower speed that gives all tires more reserve before the tire damages , and thats almost always te case for LT tires, a speed of maximum 70m/h.
An ST tire is not that different then a LT but more often damage because of more deflection because of more load for the same pressure .
If you would give a LT tire the same pressure for the load as a ST of same sises and loadkind, it would also damage more often.

Wow, this is such wrong information I don't even know where to start.

LMAO...
Correct, not even going to try to sort that post out... All the real facts, would never change a thing in the way the ST crew thinks anyway, right...?

A poll with everyone that had blowouts with ST tires, and another poll of LT tire blowouts,(if you can find enough LT blowouts to make a valid pole..?) might be interesting to compare...

jmo
2500_Grunt
Explorer
Dec 13, 2014
lincster wrote:
jadatis wrote:
My conclusion is the lower speed that gives all tires more reserve before the tire damages , and thats almost always te case for LT tires, a speed of maximum 70m/h.
An ST tire is not that different then a LT but more often damage because of more deflection because of more load for the same pressure .
If you would give a LT tire the same pressure for the load as a ST of same sises and loadkind, it would also damage more often.

Wow, this is such wrong information I don't even know where to start.

Wrong information is right!

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Tire pressure and temps while towing

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