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Nitrogen to fill tires?



 
 
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  #1  
Old January 4th 05, 02:18 AM
Kevin Oberle
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Default Nitrogen to fill tires?

I was just at my friendly neighbourhood Costco and saw a sign advertising
that they can fill your tires with nitrogen instead of ordinary air. This
is something I've never heard of, though if the idea has trickled down to
Costco it must have been around for a while.

What are the benefits of using N2 in one's tires?

Kevin
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  #2  
Old January 4th 05, 07:27 AM
Jim Levie
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On Mon, 03 Jan 2005 19:18:24 -0600, Kevin Oberle wrote:

> I was just at my friendly neighbourhood Costco and saw a sign advertising
> that they can fill your tires with nitrogen instead of ordinary air. This
> is something I've never heard of, though if the idea has trickled down to
> Costco it must have been around for a while.
>
> What are the benefits of using N2 in one's tires?
>

The advantages are said to be that nitrogen diffues through the tire wall
about three times slower than oxygen and that it does not contribute to
oxidation of the interior of the tire. I guess I can't see where either of
those are significant on a passenger vehicle.

On aircraft and commercial vehicle tires I can see an advantage in
reducing degradation of the tire carcase from oxidation since retreading
of aircraft tires is important as a cost reduction mechanism.

This seems to be something of a fad, driven in part by the availability of
nitrogen separating systems like those similar to
http://www.irco.com/pressroom/newsatir/is/58711.html

--
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  #3  
Old January 4th 05, 09:15 PM
Al
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> The advantages are said to be that nitrogen diffues through the tire
> wall about three times slower than oxygen


Utter rubbish. In fact, nitrogen will 'diffuse' faster than oxygen!

> and that it does not
> contribute to oxidation of the interior of the tire.


Vulcanised rubber does not oxidise.

If you believe this crap you'll believe that the earth is flat ;-)

Al.
  #4  
Old January 4th 05, 10:58 PM
Badger
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"Al" > wrote in message
. 4...
>> The advantages are said to be that nitrogen diffues through the tire
>> wall about three times slower than oxygen

>
> Utter rubbish. In fact, nitrogen will 'diffuse' faster than oxygen!


Sorry, Al, you are wrong.
Nitrogen (n2) molecules are larger than Oxygen (o2) ones, air is a mix of
primarily n2 and o2, o2 bleeds out of a wheel (beads, valves etc, not
necessarily through the carcass although that also is a factor) at a faster
rate causing a pressure drop.
This same theory is exactly how an on-board oxygen generating system from an
aircraft works, air is passed through a bed of zeolite crystal media, the
larger n2 molecules are trapped in the matrix, allowing an "artificially
enrichened" supply of o2 which is then pressurised for supply as breathing
o2. There are 3 beds, one being back-purged by a small o2 bleed at any given
time ready for its next cycle.

>
>> and that it does not
>> contribute to oxidation of the interior of the tire.

>
> Vulcanised rubber does not oxidise.


Depends on what you class as oxidation, main deterioration of tyres is
caused by ultraviolet light and foreign chemical contact, such as oils and
fuels.

>
> If you believe this crap you'll believe that the earth is flat ;-)
>
> Al.


Ok, then believe an aircraft engineering technician with over 22 years
experience. Or go read up on the subject, a company in the UK called
Normalair Garret might be a good starting point.......
Badger.


  #5  
Old January 4th 05, 11:11 PM
daytripper
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On 4 Jan 2005 20:15:54 GMT, Al > wrote:

>> The advantages are said to be that nitrogen diffues through the tire
>> wall about three times slower than oxygen

>
>Utter rubbish. In fact, nitrogen will 'diffuse' faster than oxygen!
>
>> and that it does not
>> contribute to oxidation of the interior of the tire.

>
>Vulcanised rubber does not oxidise.
>
>If you believe this crap you'll believe that the earth is flat ;-)


30 seconds with Google would have saved you from embarrassing yourself.

hth ;-)
  #6  
Old January 4th 05, 11:49 PM
Al
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> Nitrogen (n2) molecules are larger than Oxygen (o2) ones

Nope. N2 molecules are 1.09 Angstrom, O2 are 1.21 Angstrom.

>> Vulcanised rubber does not oxidise.

> Depends on what you class as oxidation


As in 'Oxidation'?

> main deterioration of tyres is
> caused by ultraviolet light


Correct. Not oxidation at all.

Al.
  #7  
Old January 4th 05, 11:52 PM
Al
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>>If you believe this crap you'll believe that the earth is flat ;-)
> 30 seconds with Google would have saved you from embarrassing yourself.
> hth ;-)


Damn! It seems I'm wrong!!

http://www.flat-earth.org/platygaea/faq.html

I always knew there was something sinister going on ....

Al.
  #8  
Old January 5th 05, 12:49 AM
Badger
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"Al" > wrote in message
. 4...
>> Nitrogen (n2) molecules are larger than Oxygen (o2) ones

>
> Nope. N2 molecules are 1.09 Angstrom, O2 are 1.21 Angstrom.
>
>>> Vulcanised rubber does not oxidise.

>> Depends on what you class as oxidation

>
> As in 'Oxidation'?
>
>> main deterioration of tyres is
>> caused by ultraviolet light

>
> Correct. Not oxidation at all.
>
> Al.


Ok then Al, it would seem according to you that OBOGS can't and doesn't
work, aircraft designers and scientists are all wrong and that pilots are
therefore suffocating due in fact to n2 molecules being smaller than o2
ones!!!
Go read properly before you make a bigger fool of yourself than you already
have.
Badger.


  #9  
Old January 5th 05, 01:19 AM
Oldun
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Surely, the question is; would you notice the difference between inflating
your tyres with nitrogen and air?

I believe it could be a great scam, charge people X amount for N2 from a
pretty grey coloured hose connected to the garage compressor.

Oldun


"Al" > wrote in message
. 4...
>>>If you believe this crap you'll believe that the earth is flat ;-)

>> 30 seconds with Google would have saved you from embarrassing yourself.
>> hth ;-)

>
> Damn! It seems I'm wrong!!
>
> http://www.flat-earth.org/platygaea/faq.html
>
> I always knew there was something sinister going on ....
>
> Al.



  #10  
Old January 5th 05, 04:22 AM
The Malt Hound
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Default

"daytripper" > wrote in message
...
> On 4 Jan 2005 20:15:54 GMT, Al > wrote:
>
>>> The advantages are said to be that nitrogen diffues through the tire
>>> wall about three times slower than oxygen

>>
>>Utter rubbish. In fact, nitrogen will 'diffuse' faster than oxygen!
>>
>>> and that it does not
>>> contribute to oxidation of the interior of the tire.

>>
>>Vulcanised rubber does not oxidise.
>>
>>If you believe this crap you'll believe that the earth is flat ;-)

>
> 30 seconds with Google would have saved you from embarrassing yourself.
>
> hth ;-)


My understanding was that the nitrogen would expand less when heated,
thereby making the tire pressure more stable under varying tire temps.

Right? Wrong? Probably moot in any case.

--
Malt Hound
(remove *all spam* to reply)
"Always remember that I have taken more out of alcohol than alcohol has
taken out of me."
-Winston Churchill


 




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