Filling Nitrogen in tyres instead of Air

sucking out air n den refilling again with nitrogen...i can understand....bt y do this many times?......

just one wud b okay ?..wudnt it ?.....from 100% air ---to absolutely no air....n den all Nitro.....   ?..so suckin out n refilling a few times ?

On paper it looks ok-but a single emptying wont help as 100% of the air cannot be removed!

Coming to think of it...why is N2 being considered? Because it does not corrode? Whatever be the reason, if one wants to replace air, it would be better to fill tyres with some inert gas like Argon, Xenon, etc. This would be expensive...but at least you have something to show (or brag about) for the money spent.

Making nitrogen is relatively inexpensive-thats the reason for the obivious choice(although there are other aspects also).

Do have a look here also.

Binoy, what I gather from that article is (my counter-points in red)...

1. Loss of 1.5 psi/month with ordinary air as compared to 1.5 psi/6 months with N2 (hence better mileage, environment friendliness, etc.) - Is it really such a chore to get the air topped up every month? I mean most people refuel approx. every 2-4 weeks and most pumps also have the facility to fill air free of cost. So why not top up air the same time one refuels the car? It hardly takes a few extra minutes...
   
2. Reduction in corrosion if N2 is filled, hence more safety - Is there any definite quantitative data which points to the fact (notion, rather) that tyres with normal air are unsafe? If yes then wouldn't manufacturers have already made (or gone for) alternate tyre materials research or technology? Or at least issued (dire) warnings about the perils of using ordinary air to fill up tyres. This, especially considering that powered vehicles have been manufactured for at least the past 60-100 years most of which (incidentally) use pneumatic (i.e., air-filled tube-type) tyres.
   

The article also mentions NASCAR, Aircraft and NASA/US military. That does not mean consumer vehicles need to use N2 in tyres. The applications above are a lot more demanding than ordinary driving. For racing, yes tyres are subject to that kind of abuse which warrants N2 instead of air simply because the heat and stresses are so high that it is well-worth the effort to pre-empt any chance of failure and this definitely includes failure due to presence of vapour and/or oxygen in tyres. Ditto for aircraft - a tyre burst on the runway is completely different from that on a highway. Also include the fact that the weather is not always good everywhere. That puts aircrafts in the same risk category as the next point. For NASA/military, yes N2 is required in tyres due to the risk of freezing (of the water content in the air, of course) which may render the vehicles unusable or lead to fatal accidents.

Well Rohit if you go through the previous posts in this thread you will understand that even i share the same doubts that you have highlighted.

I personally am not convinced about the Nitrogen aspect mainly because of the practicality aspect-ie gain of about 10-15% max nitrogen in tyres(78%-in air/90-95%-in 'nitrogen').

The crux of the pratical aspects to this issue was posted by Pankaj-'the prices have come down for nitrogen and the same is assesible for most users-so whats the harm in giving it a try?'

I intend to follow this up-but the lack of filling stations were i stay is a downer. I guess this thread is quite interesting views are expressed here-keep at it guys!

Here it has always been more expensive - the price has come down from Rs.100/- per tyre to Rs.50/- (free refilling for 6 months).

Other places I think it is Rs.20-25/- per tyre.  That too is high - as compared to the price we pay for Air refilling.

Nitrogen may become popular only if the prices come down to Rs.5-10/- per tyre.

... But yes, notwithstanding the present prices (whatever), we should give a try & get a first-hand experience - I have no complaints - but will switch back to Air once when the 6-month free refilling is over (2 months from now).

free filling for 6 months basically means unlimited filling for 6 months ..rite ?....

Yes - unlimited number of times.  Have done that only once - after 3 months, as required (it is all discussed before).

i just found this link talking abt nitogen for tyres

http://www.carbibles.com/tire_bible_pg2.html