Tire Air-Presure Preparation: timing
Silly question: We are getting ready for a short journey tomorrow afternoon; is it okay to check and fill the air in the trailer tires today; or, should I wait until tomorrow? Does it really matter?
Forum Discussion
Once had contact with someone o a valve importer in Holland ( where I live) And He gave documents about maximum pressures of valves given , where for cold of 18 degr C/65 degr F, and standards for higher pressure for warm above that max cold pressure the valves must stand . He also wrote me that the tire inside air can rise to boiling point of water even ( 100 degr C/212 degr F) , for instance by descending from mountains annd using the brakes to often.
Then the heat of brakes is transported by the rimms to the tire inside.
Once had me explained in a long telephone conversation with a man from Vredestein ( now part of Apollo) about tire pressure advice is for giving the rubber not higher temp then the point at wich to many sulfur bridges form. The rubber needs a sertain amount of sulfur bridges to make it flexible, so your nailprint wont keep standing in the rubber, but to many make it hard ireversible, and every next bending of it by the deflections , then tears the damaged structure a bit further until at a sertain moment blowing tire, or treath coming loose .
Mind that every segment of the tire deflects and flexes back about 10 times a second when driving about 50m/h. This produces heat, wich has to be cooled down, or better transported to the outside.
Dont know anymore if he also mentioned the 65 degr F , but combined it myself.
Some write its 20 degr C /68 degr F . but this 3 degr F would not give such a difference , so who cares who's exactly right.
And because for valves also 65 degr is used, I assume for tires too.
So no hard evidence but circumstantial.
Then the heat of brakes is transported by the rimms to the tire inside.
Once had me explained in a long telephone conversation with a man from Vredestein ( now part of Apollo) about tire pressure advice is for giving the rubber not higher temp then the point at wich to many sulfur bridges form. The rubber needs a sertain amount of sulfur bridges to make it flexible, so your nailprint wont keep standing in the rubber, but to many make it hard ireversible, and every next bending of it by the deflections , then tears the damaged structure a bit further until at a sertain moment blowing tire, or treath coming loose .
Mind that every segment of the tire deflects and flexes back about 10 times a second when driving about 50m/h. This produces heat, wich has to be cooled down, or better transported to the outside.
Dont know anymore if he also mentioned the 65 degr F , but combined it myself.
Some write its 20 degr C /68 degr F . but this 3 degr F would not give such a difference , so who cares who's exactly right.
And because for valves also 65 degr is used, I assume for tires too.
So no hard evidence but circumstantial.
