>>Isn't this one reason why they suggest inflating the tyres with nitrogen gas?
Nitrogen, oxygen both follow the same gas laws, in my calculation I am assuming constant volume which will be some sort of approximation but probably not much.
I suppose you're thinking oxygen might leak out faster than nitrogen. I don't think the difference, if there is one, matters. Certainly not for any critical application where there are regular checks or TPM, and where 'ambient' air is 78% N to start with. Unless you flush the tyres when inflating with N then there will still be around 7% O in there anyway.
I think it's probably to do with using dry gas for inflation rather than ambient air compressed, with unknown water content..
Last edited by: Manatee on Thu 4 Nov 21 at 11:25
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Cold tyre pressures 
Cold tyre pressures 
