Tire Temperature - What is Significant?
I got an IR thermometer "gun" and started using it on this trip for the first time. I'm not sure what I'm looking for. After an hour of 60mph driving in 70 degree F temperature, I pulled off the roa...
Forum Discussion
What Topic starter did by measuring the sidewall is to my opinion the best way to determine the inside-air temperature of the tire.
This because the isolation of the rubber is the least on that spot.
A TMPS mostly measures something between the inside and outside temperature , and already someone wrote that it gave colder when raining.
What happens when tires are roling when driving.
Every segment of tire bends by deflecting about 10 times a second, and produces heat energy.
This is transported by the inside tire air to the rimm and thinner parts of the tire ( sidewall middle) where it is transported to the outside tire.
so the inside tire temp says something about the isolation of the tire.
The spots ( or better rings) of the tire that produce the most heat by the most bending of the rubber ( heal of tire) must stay under a sertain temperature to prevent them from getting hard and crack at next bendings.
I estimate that critical temperature to be 130degr Celcius/ 265degr Fahrenheit) where hardening of rubber begins .
The tire is "backed " at 170 degr /340 degr F to set the right amount of sulfur bridges wich gives the tire its right balance of flexibility.
So it can be that the critical rings of the tire are 190 degr F and the inside tire temp is 115 degrees and outside temp is 70 degr.
There has to be a temperature difference to give over the energy.
This because the isolation of the rubber is the least on that spot.
A TMPS mostly measures something between the inside and outside temperature , and already someone wrote that it gave colder when raining.
What happens when tires are roling when driving.
Every segment of tire bends by deflecting about 10 times a second, and produces heat energy.
This is transported by the inside tire air to the rimm and thinner parts of the tire ( sidewall middle) where it is transported to the outside tire.
so the inside tire temp says something about the isolation of the tire.
The spots ( or better rings) of the tire that produce the most heat by the most bending of the rubber ( heal of tire) must stay under a sertain temperature to prevent them from getting hard and crack at next bendings.
I estimate that critical temperature to be 130degr Celcius/ 265degr Fahrenheit) where hardening of rubber begins .
The tire is "backed " at 170 degr /340 degr F to set the right amount of sulfur bridges wich gives the tire its right balance of flexibility.
So it can be that the critical rings of the tire are 190 degr F and the inside tire temp is 115 degrees and outside temp is 70 degr.
There has to be a temperature difference to give over the energy.
