Air pressure jumping in front tires
I have a Freightliner Tag with 22.5 tires. I set rear tires at 85-88lbs and fronts at 117lbs. After driving rears jump up to 98-105. The fronts will hit 143-147. The fronts are within 1-3 lbs of ea...
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Can also be that the inner duals deflect more by the roadcurve.
More deflection gives more heatproduction, so hotter inside tire temp.
With higher inside tire temp the pressure goes up , and with that even more weight is shifted to the inner tires, wich makes the difference in deflection between innner and outer duals even more so also temp in tire more difference.
But all pressure advices are for that the rubber does not get over a temp at wich it hardens , and damages by next bendings/deflections of that rubber.
I estimated that when outside tire( ambiënt) temp is 18 degrC/65degrF , the inside tire temp can rise to 60 degrC/140 degr F, and then the hottest part of tirerubber is about 130 degrC/265 degrF.
If the rubber gets hotter at any spot, at that spot to much sulfurbridges form , wich makes that piece hard so unbendable, and it crackes / damages.
The inside tire temp can be determined by the pressure-chanche.
the pressure rising of topicstarter calculate to a way to hot inner tire temp , especially front.
You have to high up the front pressure to gett lesser deflection so lesser heatproduction, so lower inside tire temp, so lower temp of hottest part of rubber of tire.
but by driving for hours with that to high inside tire temp/pressure rising, you probably already damaged the tires.
And once the damage to the structure of rubber is done, there is no return. Can even be that the higher filled cold pressure tears the damaged structure apart and the tire blows sooner then when you leave it lower.
Leaving it lower , mayby only after 3 jears your tires will blow, and then the tiremaker only refunds a small part of tires if they have a waranty system for that.'
They dont pay the damage to the truck or people .
so your in a difficunt situation now, whil chanches now have positive effect or yust quicken the damage to tires?
Succes
If you ever weigh, I can help you with a pressure advice.
Greatings from a Dutch Pigheaded Self-declared Tirepressure-Specialist
Peter
More deflection gives more heatproduction, so hotter inside tire temp.
With higher inside tire temp the pressure goes up , and with that even more weight is shifted to the inner tires, wich makes the difference in deflection between innner and outer duals even more so also temp in tire more difference.
But all pressure advices are for that the rubber does not get over a temp at wich it hardens , and damages by next bendings/deflections of that rubber.
I estimated that when outside tire( ambiënt) temp is 18 degrC/65degrF , the inside tire temp can rise to 60 degrC/140 degr F, and then the hottest part of tirerubber is about 130 degrC/265 degrF.
If the rubber gets hotter at any spot, at that spot to much sulfurbridges form , wich makes that piece hard so unbendable, and it crackes / damages.
The inside tire temp can be determined by the pressure-chanche.
the pressure rising of topicstarter calculate to a way to hot inner tire temp , especially front.
You have to high up the front pressure to gett lesser deflection so lesser heatproduction, so lower inside tire temp, so lower temp of hottest part of rubber of tire.
but by driving for hours with that to high inside tire temp/pressure rising, you probably already damaged the tires.
And once the damage to the structure of rubber is done, there is no return. Can even be that the higher filled cold pressure tears the damaged structure apart and the tire blows sooner then when you leave it lower.
Leaving it lower , mayby only after 3 jears your tires will blow, and then the tiremaker only refunds a small part of tires if they have a waranty system for that.'
They dont pay the damage to the truck or people .
so your in a difficunt situation now, whil chanches now have positive effect or yust quicken the damage to tires?
Succes
If you ever weigh, I can help you with a pressure advice.
Greatings from a Dutch Pigheaded Self-declared Tirepressure-Specialist
Peter
