Think you might be confusing hydrogen with helium (which is inert)

Chris

You're right, i did confuse the two

We fill our fighter planes tyres with it. In fact i'm pretty sure all military aircraft have nitrogen filled tyres.

There's a garage near me that claims to be able to fill tyres with some substance that makes them puncture-proof. I think it costs about

plus a bit more bother having to go to your tyre dealer for top ups. Not for me i'm afraid.

The point of Nitrogen is that they don't need topping up as often, so they are LESS hassle in the long run.

I've never had to top mine up, and when i get new tyres fitted, they get Nitrogen again.

When I got my winter tyres for my Sedici, I had them inflated with Nitrogen. Luckily I didn

also by using nitrogen it can protect the inner alloy wheel as there is no water content. where as normal air will have a fair amount of water content.

people who will gain

1. people using there car all day everyday loads of miles

2 people with cars in storage i.e show car

3. lorrys and coaches ( travel again)

thats it no rela point to it apart fromt he 3 above

Actually 2 thing occur to me:confused:

1) If the tyres stay inflated for longer because the large Nitrogen molecules find it harder to sneak through the permeable tyres than oxygen, (the next most abundant gas in the tyre), then why doesn’t a conventionally filled tyre end up filled up with Nitrogen over a period of time and several tops up with Nitrogen rich normal air???? The tyre should act as a Nitrogen filtering barrier

2) when the tyre is filled with Nitrogen, there must be about 1 bar of normal air in their to start with, or do they put the tyre into a vacuum or purge the tyre with Nitrogen before sealing the rim and inflating it properly?

Actually 2 thing occur to me:confused:

1) If the tyres stay inflated for longer because the large Nitrogen molecules find it harder to sneak through the permeable tyres than oxygen, (the next most abundant gas in the tyre), then why doesn

The point of Nitrogen is that they don't need topping up as often, so they are LESS hassle in the long run.

I've never had to top mine up, and when i get new tyres fitted, they get Nitrogen again.

Yes, I know what you mean but I'm often changing the pressures for trackdays.

Yes, I know what you mean but I'm often changing the pressures for trackdays.

Ahhh, i get you now. .

Didn't realise you took your car on the track and changed pressures accordingly.

You're actually thinking about this in a logical & scientific manner. I don't think that's the point

You are right. I surprised myself too!:eek:

I notice that the questions have been ignored. I feel there is an elephant in the room

Nitrogen is OK for aircraft tyres but I think they are mainly of novelty value for cars.