Scarecrow Man Posted March 26, 2008 Report Share Posted March 26, 2008 Most tires are filled with compressed air, which when dry consists of about 78 percent nitrogen, 21 percent oxygen, and 1 percent other gases by volume. Water vapor (humidity) can make up as much as 5 percent of the volume of air under worst-case conditions. Filling your tires with nitrogen mainly does two things: it eliminates moisture, and it replaces skinny oxygen molecules with fat nitrogen molecules, reducing the rate at which compressed gas diffuses through porous tire walls. That means, theoretically at least, that a tire filled with nitrogen retains optimal pressure longer, leading to more uniform tire wear and better gas mileage. The commonly quoted figure is that tires inflated to 32 psi get 3 percent better mileage than at 24 psi.Does nitrogen make any practical difference? You couldn't prove it by me. I found no scientific tests showing that nitrogen-filled tires stayed inflated longer than average under normal conditions. A car-buff buddy was sure it worked but conceded he had only anecdotal evidence that it did. Full Story Quote Link to comment Share on other sites More sharing options...
Mike567 Posted March 26, 2008 Report Share Posted March 26, 2008 I will stick to using a air pump :lol:, its cheaper (free). Quote Link to comment Share on other sites More sharing options...
-pops- Posted March 26, 2008 Report Share Posted March 26, 2008 If nitrogen does diffuse through the tyre faster than the other components of air then continual topping up the pressure to replace lost oxygen etc. will soon reach a stage where the majority of the oxygen has been removed - example: an initial fill with air containing 21% oxygen. This diffuses and topped up with air containing 21% oxygen thus the tyre then contains 4.41% oxygen when that diffuses, it is replaced and the oxygen content of the gas in the tyre is 0.9261%. When that diffuses and replaced, the tyre will contain 0.194481% oxygen and so on.I don't think so somehow. Quote Link to comment Share on other sites More sharing options...
Scarecrow Man Posted March 26, 2008 Author Report Share Posted March 26, 2008 The whole purpose for this is that it prevents erosion, leaking etc. It's been used in Aircraft tires as well as professional racing tires for quite some time now. On this side of the pond it's apparently becoming the standard thing to do now a days. Quote Link to comment Share on other sites More sharing options...
Gandalph Posted March 26, 2008 Report Share Posted March 26, 2008 I've never seen a nitrogen pump for tyres in Britain. Quote Link to comment Share on other sites More sharing options...
deuces wild Posted March 26, 2008 Report Share Posted March 26, 2008 I've never seen a nitrogen pump for tyres in Britain. What is a TYRE? :lol: :lol: :lol: B) B) Quote Link to comment Share on other sites More sharing options...
rong Posted March 26, 2008 Report Share Posted March 26, 2008 the outer part of a wheel. (Spelt tyre in British English.) Quote Link to comment Share on other sites More sharing options...
lester1 Posted March 27, 2008 Report Share Posted March 27, 2008 the outer part of a wheel. (Spelt tyre in British English.)The original and best ( apart from gordie english) pronounced tiya :lol: Quote Link to comment Share on other sites More sharing options...
Gandalph Posted March 27, 2008 Report Share Posted March 27, 2008 the outer part of a wheel. (Spelt tyre in British English.)The original and best ( apart from gordie english) pronounced tiya :lol:Ah thout it waz Teah marra! :D Quote Link to comment Share on other sites More sharing options...
CurlyWhirly Posted March 27, 2008 Report Share Posted March 27, 2008 I've never seen a nitrogen pump for tyres in Britain. What is a TYRE? :lol: :lol: :lol: B) B)http://dictionary.reference.com/browse/tireI tend to associate the word 'tire' with description 1 in the link:tire1. to reduce or exhaust the strength of, as by exertion; make weary; fatigue: The long walk tired him.2. to exhaust the interest, patience, etc., of; make weary; bore: Your stories tire me.–verb (used without object)3. to have the strength reduced or exhausted, as by labor or exertion; become fatigued; be sleepy.4. to have one's appreciation, interest, patience, etc., exhausted; become or be weary; become bored (usually fol. by of): He soon tired of playing billiards.–noun5. British Dialect. fatigue. Quote Link to comment Share on other sites More sharing options...
andsome Posted March 31, 2008 Report Share Posted March 31, 2008 A tyre dept in Lichfield always fills new tyres with nitrogen.P.S. DW, please remember that ENGLISH is just that, it is Americans who have messed about with our language. :D :D :D :D :D Quote Link to comment Share on other sites More sharing options...
deuces wild Posted March 31, 2008 Report Share Posted March 31, 2008 A tyre dept in Lichfield always fills new tyres with nitrogen.P.S. DW, please remember that ENGLISH is just that, it is Americans who have messed about with our language. :D :D :D :D :DWe finally have it fixed though. :lol: :lol: Quote Link to comment Share on other sites More sharing options...
andsome Posted March 31, 2008 Report Share Posted March 31, 2008 A tyre dept in Lichfield always fills new tyres with nitrogen.P.S. DW, please remember that ENGLISH is just that, it is Americans who have messed about with our language. :D :D :D :D :DWe finally have it fixed though. :lol: :lol: What a laugh. :lol: Quote Link to comment Share on other sites More sharing options...
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