One spark? :huh: Are you thinking of 100% oxygen? Pure Nitrogen isn't a combustible gas, but then, regular air doesn't spark too good either... 100% oxygen on the other hand...
Ummm. Oxygen isn't actually combustible either there sparky. Oxygen accelerates combustion of other flammable materials (perhaps the rubber of the tire), but does not burn by itself.
Absolutely right that nitrogen is an inert gas.
....now filling your tires with an Acetyelene and Oxygen mixture.....would be thoroughly entertaining :blink: