bergref10 wrote on Nov 30
th, 2016 at 3:28am:
Don't all the race car crews use nitrogen in their tires?
All... No. A certain percentage yes but more for the dryness of it which can also be had with normal compressed air. I setup road and drag cars. Some of the side walls are so thin they can be seen bubbling if you spray them with soapy water. The belts make them strong not the extra rubber. They like to dissipate heat out the side walls. It is a big reason the air is adjusted just prior to the race.
bergref10 wrote on Nov 30
th, 2016 at 3:28am:
His point about molecule size caught my attention. More research would need to be done on that one.
First a molecule can be larger in one dimension but be very thin looking at it from a different angle. R134a and R-404a refrigerants leak like crazy because they are long and skinny, allowing their escape. But measured in their longest dimension are larger than their predecessors.
You are describing compound molecules. Fuel molecules for example are designed in different shapes to slow down the burn hence octane. The O2 and N2 don't really fall into the category.
bergref10 wrote on Nov 30
th, 2016 at 3:28am:
I have never used nitrogen in my tires,but the lower pressures and smaller leakrate would be important to some.
I use the compressed air that is dry from our shop system. I normally see less then 1 psi difference between services which can be 3 or 4 months apart.
Just my take on it that's all.