Trailer tire pressure in the hot summer
Hello. I am sure this has been asked and I apologize if I am in the wrong section. Do you keep your tires at max pressure during the hot summer? My tires are 50 PSI cold. In the morning I plan to chec...
Forum Discussion
If 50 psi is the pressure needed for the maximum load and not the maximum pressure of tire , this 10 psi extra so 60 psi is allowed by the tire maker, and often adviced by them for ST tires even for 75m/h instead of standard 65m/h.
Only for normal car tires ( P-tires) and XL/Extraload/reinforced they give only maximum pressure on sidewall. From C-load/6PR ( maxloadpressure 50 psi) tires and up they give the maxloadpressure/ reference-pressure/ pressure needed for the maximum load on sidewall mostly like this "maximum load xxxx lbs AT yyy PSI( cold) " or in KG and kPa, and this is not the maximum ( cold) pressure of tire.
That maximum is probably ( as I concluded of PDF of Semperit( continental) 1.4 times the maxloadpressure// and then even cold.
when it gets warmer inside the tire this may even highen up .
I make that of the remark that a tire standing still ( so no heatening up of the inside air by driving or braking) is allowed to carry 2 times the maximum load when 1.4 times the maxloadpressure// .
Standing still only ambient temperature rising or sunshine can heaten up the tire inside. So I suspect the absolute highest pressure is about 1.5 to mayby even 2 times the maxloadpressure//.
Using 60 PSI instead of 50 is 1.2 times the maxloadpressure ( cold) so even enaugh is left for pressure rising bij temperature rising.
the tire can stand it and even the valves.
to make it complete maxloadpressure is for P-tires in American system always 35 psi regardles of what maximum pressure is given on sidewall.
for XL// its 41 psi. Extra between maxload- and maximum-pressure is used for highening up the maxloadpressure for higher speed then the speed the maximum load is calculated for .
This gives the tire lesser deflection and so lesser heatproduction by driving . Mind that the heatprocuction is what counts for giving damage or not to tire, and its a product of howmuch the rubber bends and bend back by every deflection and the times per second it happens when driving ( 50 m/h about 10 times a second ).
Only for normal car tires ( P-tires) and XL/Extraload/reinforced they give only maximum pressure on sidewall. From C-load/6PR ( maxloadpressure 50 psi) tires and up they give the maxloadpressure/ reference-pressure/ pressure needed for the maximum load on sidewall mostly like this "maximum load xxxx lbs AT yyy PSI( cold) " or in KG and kPa, and this is not the maximum ( cold) pressure of tire.
That maximum is probably ( as I concluded of PDF of Semperit( continental) 1.4 times the maxloadpressure// and then even cold.
when it gets warmer inside the tire this may even highen up .
I make that of the remark that a tire standing still ( so no heatening up of the inside air by driving or braking) is allowed to carry 2 times the maximum load when 1.4 times the maxloadpressure// .
Standing still only ambient temperature rising or sunshine can heaten up the tire inside. So I suspect the absolute highest pressure is about 1.5 to mayby even 2 times the maxloadpressure//.
Using 60 PSI instead of 50 is 1.2 times the maxloadpressure ( cold) so even enaugh is left for pressure rising bij temperature rising.
the tire can stand it and even the valves.
to make it complete maxloadpressure is for P-tires in American system always 35 psi regardles of what maximum pressure is given on sidewall.
for XL// its 41 psi. Extra between maxload- and maximum-pressure is used for highening up the maxloadpressure for higher speed then the speed the maximum load is calculated for .
This gives the tire lesser deflection and so lesser heatproduction by driving . Mind that the heatprocuction is what counts for giving damage or not to tire, and its a product of howmuch the rubber bends and bend back by every deflection and the times per second it happens when driving ( 50 m/h about 10 times a second ).
