Originally Posted by
dddd
Smoggy air in a tube or even a big container won't rot your tubes.
If smog can degrade the exposed base of the stem, what prevents it from degrading the interior of the tube?
But a bike in a ventilated garage will see steady degradation from the steady input of photochemical smog molecules aka ozone.
Even in a decently-sealed house, the effect of outdoor smoggy air seems tremendously reduced, as contained air readily loses it's ozone concentration to whatever organic materials it is exposed to.
Sure. By degrading the organic material it contacts.
So, to answer your non-question, smoggy air pumped into the tube is going to present an insignificant amount of ozone exposure relative to how much ozone can attack any exposed area of the tube.
But the exposed parts of a bike that's being ridden (or simply exposed to outdoor air) will be continuously subjected to ozone's full effects so may degrade rapidly if the air is bad.
The air in your tube is compressed to 7 or 8 bar, which means more ozone than the same volume at 1 bar, and it gets replenished every time you fill your tires.