Originally Posted by
Fred Smork
finally an answer to the question. smaller => leaks out faster. More expensive initially,and leaks out faster. Heavier => slower.
By the way. I think moisture from the air would slowly collect in the tube, after repeated refilling. I wonder how much would collect in a month if you pump up your tires every day?
I dislike responding to a 12 year old thread but your statement kind of requires it. A heavier molecule doesn’t necessarily mean that it diffuses slower. There are other factors to consider like the solubility of the gas in the rubber of the tube. Think of it this way: If you made a container out of sugar, it would hold hexane forever. It would only old water for a little while. Hexane has a higher molecular weight and is much, much larger than water but it won’t dissolve the sugar.