mrcheerful . wrote:

You should get your tyres blown up with nitrogen, many tyre places do this
nowadays, the advantages are inert with the rubber and the tyres don't lose
pressure so quickly.

Nitrogen molecules are slightly smaller than oxygen molecules, so the
tyres would deflate slightly faster by diffusion if filled with nitrogen.

But you'll never notice the difference, a) because it's very small, and
b) because most deflation is through orifices, not diffusion.

As for nitrogen being inert, when was the last time you had to replace
your tyres because they had chemically degraded from the inside-out?


--
Grunff