Change Air In Tires

wrote: (clip) Enen though hydrogen is lighter,
would it cause destructive chemical reactions?
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In discussions about the advantages (or futility) of filling tires with
nitrogen, it has been established that oxygen can diffuse through the rubber
tube wall. If you filled with hydrogen, would oxygen diffuse inward? The
partial pressure of O2 outside the tube is greater than that inside. Could
this lead to a hazardous mixture?