Air pressure jumping in front tires

fairway2002 wrote:
I would not think its temp. My alarm is set at 100 degrees and never went off.. As for over loading how would you do that? Same stuff I had in last RV.

Thanks

Have you set the temp to degrees Celcius mayby.
EDIT: the poster before me also suggested this. Our posts crossed , he was 10 minutes sooner because my story was longer.
100degr Celcius is 212 degr Fahrenheit, and is boiling point of water when ambiënt pressure is 1013 mbar/about 14.7 psi.
Can be that your TMPS system can be set to giving Fahrenheit and Celcius.

I had myself told by a valve importer that incidentically the tire inside can rise to even that 100 degr C /212 Fahrenheit by the heat of the brakes transported trough the rimms to the tire inside. This can happen when descending from mountains and using the brakes to often. Luckyly the speed is lower so lesser cycles of tires so lesser heatproduction.
Once did this descending myself and max speed was 40 to 50 km/h is about 25 to 30m/h.

At car racing 90 degr C / 195 degr F is mentioned as tire inside temp.

But when driving about 55m/h the tire inside has a temp of about 110 to 115 degr F/ 45 degr Celcius. this I determined by reactions , so can be a bit off , yust as the rest.
End EDIT


Yours rear going from 85psi to 98 I have put in my made spreadsheet and it gives a temperature inside tire of 133 degr F if ambiënt temp is 65 degr F. This is yust what tires inside temp may have to my estimations, but better would be colder , about 110/115 degr F.
Why go to the edges if you can have a reserve without loosing to much comfort and gripp?

Front I also filled in
When filled at 65 degr F with pressure of yours 117psi and rises to 143psi when driving spreadsheet calculates a inside tire temp of 169 degr F wich is way over 130 degr I determined to be allowed.

My spreadsheet assumes the tire not to get more volume by the higher pressure, wich will be about right for an already presurised tire

When ambiënt temp is higher the the tire inside is allowed a bit hotter then 130 degr F , because then the tire already deflects less by the higher pressure so produces lesser heat so the rubber still wont get above 265 degr F , lesser heatproduction and lesser cooling down of tire is probaby in line.
The other way around when cold outside more temperature difference so more cooling down so more deflection allowed and the hottest part of rubber wont still get above 265 degr F.