Tire pressure increase at summer temperatures
I am fairly new to class A traveling so I'm seeing things for the first time. Before I begin a trip my tires register between 101 and 104 psi on my TPMS. They are 16 ply and can handle up to 120 ps...
Forum Discussion
Even at higher ambiënt temperature, you would expect a pressure rising of 10 to 12% max and yours maximum is from 104 to 120 so about 15%, so temp in your tires gets to hot, so sertain parts of the rubber get to hot and harden,and get damaged by next bendings.
Only other way is when enaugh liqiud water in tire, wich can rise the pressure for the same higher temperature a bit more.
Will be in the range of 5 psi in practice, in theory maximum 14.5 psi when going from 32 degr F to 212 degrees F.
This water can get in by pumping the tire with a normal pump wich puts all the watergas ( humidity of ambiënt air) of the outside air in the tire. This water is in fact no problemm, cools down the tire better.
You could swich your TMPS to temperature reading, when you get the alarm, and when sensors are inside and not screwed on valves, you should have about 50degrF higher temp inside tire then ambiënt temp at your speed of 60 to 65m/h. Most likely you then still read higer difference, wich prooves the temp to be to high so the cold pressure to be to low for the load on tires.
So your pressure needs to be higher, and best is not to follow American made pressure/loadcapacity lists, but use my made lists wich give higher pressure for the same load in the lower pressures.
To check this end advice of mine, once you filled up , see if the pressure rising stays below 12% , best 10%.But if it only rises 5% its fine too.
And this will probably mean that you can use the 120 psi and still no terrible bumping and maximum reserve for more loading and unequall loading (side to side division of 47/53% is not unusual), pressure loss in time, and misreadings of pressure because of small analog schale or inacurate device.
This all will mean that you have to reset your TMPS system to a higher alarm pressure. Dont know how to, but its possible, read the manual for that, or ask the maker of it.
Only other way is when enaugh liqiud water in tire, wich can rise the pressure for the same higher temperature a bit more.
Will be in the range of 5 psi in practice, in theory maximum 14.5 psi when going from 32 degr F to 212 degrees F.
This water can get in by pumping the tire with a normal pump wich puts all the watergas ( humidity of ambiënt air) of the outside air in the tire. This water is in fact no problemm, cools down the tire better.
You could swich your TMPS to temperature reading, when you get the alarm, and when sensors are inside and not screwed on valves, you should have about 50degrF higher temp inside tire then ambiënt temp at your speed of 60 to 65m/h. Most likely you then still read higer difference, wich prooves the temp to be to high so the cold pressure to be to low for the load on tires.
So your pressure needs to be higher, and best is not to follow American made pressure/loadcapacity lists, but use my made lists wich give higher pressure for the same load in the lower pressures.
To check this end advice of mine, once you filled up , see if the pressure rising stays below 12% , best 10%.But if it only rises 5% its fine too.
And this will probably mean that you can use the 120 psi and still no terrible bumping and maximum reserve for more loading and unequall loading (side to side division of 47/53% is not unusual), pressure loss in time, and misreadings of pressure because of small analog schale or inacurate device.
This all will mean that you have to reset your TMPS system to a higher alarm pressure. Dont know how to, but its possible, read the manual for that, or ask the maker of it.
