8-)

With all the talk of greenhouse gases I am concerned with having tired
air in my bike tubes. How long can I can go between evacuating the air
and putting new air in? I am afraid that the air molecules will all be
pushed to the outer edge of the tire if I do not evacuate the tubes on a
regular basis. This could cause the tire to put too much weight on the
road and thus I am not be able to get at top speed quickly.

Does tapping on the tread move the molecules back into the center of the
tube?

9-)

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