[ds968]

Lol, yes I meant compressor of course ..the pump ( I have one or two of those in the garage also just to keep the soccer balls nice and round at all times ) would have taken slightly longer to inflate tires :-) :-)

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[Rap]

Somehow I just didn't see you pumping your tires. Inflatable mattress yes, tires no! Lol

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[ds968]

[quote name='Rap' timestamp='1413801774' post='163150']Somehow I just didn't see you pumping your tires. Inflatable mattress yes, tires no! Lol[/quote]



Phew, given various choices of inflatable things, at least you were kind enough to pick mattress ..either that or you're slipping at your advancing age and missed the opportunity for a real zinger , lol.

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[jfrahm]

[quote name='Bulti' timestamp='1413740526' post='163140']

I've got to ask: are the tires of the 6-speed also filled with plain air? All tires should loose pressure over time because the air molecules go straight trough the fabric an rubber of the tire itself...

[/quote]



Air is 78% nitrogen and 21% oxygen, I am not sure if it'd help to fill them with krypton or a bulky hydrocarbon (heh) or something.

Air, if reasonably dry, should behave like an ideal gas and no benefit should be seen from running N2 in the tires.



-Joel.

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[Bulti]

"O2 "permeates" approximately 3-4 times faster than does N2 through a typical rubber, as is used in tires, primarily because O2 has a slightly smaller effective molecular size than does N2."



I extracted it from the link underneath for those interested. It basically means that the 21% of the gas in a tire filled with plain air will leave the tire fairly quick. 100% nitrogen will last longer.



http://www.getnitrogen.org/pdf/graham.pdf

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[Rap]

DS, kindness begets kindness! Advanced age eh? Tempting but. no. Lol

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[flash]

the tanks you see out there are not 100% nitrogen either. they are generally about 95% at best (unless the tanks are brand new).

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