Tires
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Joined: May 2007
Posts: 54
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From: Atlanta Georgia USA
My Ride: 2008 535i ALS, Nav, Cold Weather package, Premium package, Logic 7
I've used nitrogen for over 2 years in two cars. These were Acura CL 1998 cars. When I replaced the tires at Costco ( I know, but Costco was $300 cheaper for the same set of tires, Michelins) Costco uses nitrogen. Frankly, after 4 sets I could not tell the difference in performance, or treadware. As for pressure changes with outside temp changes I still experienced the swing in pressure from summer to winter (here in Georgia USA). Also I did not notice any change in loss of pressure over time at roughly the same outside air temp. I do know that Costco does NOT suck all the air out of the tire before refilling with nitrogen and I certainly don't have nitrogen at home to add pressure to the tire when it is low.
In my opinon if you can get nitrogen for free then good because it will have less moisture, but if you have to pay extra I would agree with the snake oil comment above.
In my opinon if you can get nitrogen for free then good because it will have less moisture, but if you have to pay extra I would agree with the snake oil comment above.
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Joined: Apr 2006
Posts: 418
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From: Warsaw, Poland
My Ride: 2010 523i. Alpine white, dakota leather, 8 speed auto, VDC, bluetooth, HID lights, parking sensors, sport seats, black window trim, tinted rear windows
1988 Ferrari 328 GTS, nero on rosso corsa.
1992 Mazda MX-5 / Miata
2009 Ford S-Max 2.5T
Fill 'em with xenon - when someone brags about having xenon lights you can say you have xenon tyres...
helium - the unsprung mass of the wheels will be lower which will dramatically improve handling...
mustard gas - for a really hot ride...
carbon monoxide - for a killer ride...
argon - they'll stay welded to your ride.
helium - the unsprung mass of the wheels will be lower which will dramatically improve handling...
mustard gas - for a really hot ride...
carbon monoxide - for a killer ride...
argon - they'll stay welded to your ride.
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Joined: Jun 2007
Posts: 270
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Originally Posted by boltoa' post='464518' date='Aug 31 2007, 08:23 AM
And putting snake oil in your engine will make your car go 22% faster. Anyone know where I can get any? Any snake oil salesmen out there? 
"Inert gas" - I think the stuff outside the tyre, ie air, is more worrying for reactivity than the stuff in your tyre
"lacks moisture" - only because it comes in bottles produced by freezing air, and therefore removing moisture. If you filled your tyres with a foot pump on a subzero day there would be virtually no moisture in there, and that would be free
"does not oxidise/corrode/combust/etc" - see point above about what's outside the tyre that matters more...
"larger molecule size" - actually N2 is smaller than O2, or at least very very similar
"weighs less" - yeah, the weight of air really bothers me. How can we stand living in it?
"consistent in pressure" - the crucial thing here is the amount of water vapour - this can affect changes in pressure with temperature. However, for 2 dry gases, it matters not whether they are N2 or gaseous uranium, the pressure/temperature relationship is identical - Boyle's law, in fact, been around since 1662, or about 13 billion years, or about 4022 years for any creationists out there.
"safe in freezing conditions" - this one really made me laugh
. How many people here have had the air in their tyres freeze on them? O2 boils at -182, carbon dioxide (<1% of air) may be the first component to liquify (or sublime to a solid more likely, depending on the pressure) but even that would never happen on any point on earth (around -78C at 1 bar)
Regards
Andrew
(a chemical engineer)
"Inert gas" - I think the stuff outside the tyre, ie air, is more worrying for reactivity than the stuff in your tyre
"lacks moisture" - only because it comes in bottles produced by freezing air, and therefore removing moisture. If you filled your tyres with a foot pump on a subzero day there would be virtually no moisture in there, and that would be free
"does not oxidise/corrode/combust/etc" - see point above about what's outside the tyre that matters more...
"larger molecule size" - actually N2 is smaller than O2, or at least very very similar
"weighs less" - yeah, the weight of air really bothers me. How can we stand living in it?
"consistent in pressure" - the crucial thing here is the amount of water vapour - this can affect changes in pressure with temperature. However, for 2 dry gases, it matters not whether they are N2 or gaseous uranium, the pressure/temperature relationship is identical - Boyle's law, in fact, been around since 1662, or about 13 billion years, or about 4022 years for any creationists out there.
"safe in freezing conditions" - this one really made me laugh
. How many people here have had the air in their tyres freeze on them? O2 boils at -182, carbon dioxide (<1% of air) may be the first component to liquify (or sublime to a solid more likely, depending on the pressure) but even that would never happen on any point on earth (around -78C at 1 bar)Regards
Andrew
(a chemical engineer)
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Joined: Jan 2005
Posts: 398
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From: Brookline, MA, USA
My Ride: 2007 530Xi - Navigation, Premium package, Steptronic.
Originally Posted by pointerman' post='464676' date='Aug 31 2007, 06:32 PM
Well, considering NASCAR and most other racing applications use it now there must be some benefit. My understanding is it is more difficult for the molecules to seep through the rubber. I don't know any place that charges for it. All tire shops around here include it for free for life.
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Joined: Oct 2004
Posts: 14,776
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From: So Cal, USA
My Ride: 545iSMGSilver GrayAuburn Dakota LeatherLogic 7 Premium SoundSports Package
Originally Posted by boltoa' post='464518' date='Aug 31 2007, 06:23 AM
"weighs less" - yeah, the weight of air really bothers me. How can we stand living in it?
at 16 lbs / sq inch
