Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




4690 posts

Uber Geek

Trusted
Subscriber

#233440 16-Apr-2018 14:21
Send private message

A while ago there was a thread about the benefits, or lack of, relating to inflating tyres with nitrogen but I don't recall seeing an answer to this question.

 

When my car was last serviced the dealer filled the tyres with nitrogen, which was unnoticed by me at the time. I am now wondering if I need to monitor the pressure and top them up at the service station as I would normally do. If I top them up with plain air are there any potential problems with having a combination of both air and nitrogen in the tyres? 


View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
6705 posts

Uber Geek

Trusted
Lifetime subscriber

  #1997091 16-Apr-2018 14:24
Send private message

Yes you need to monitor the pressure and nitrogen filled tyres are a SCAM and topping up with air from petrol station is fine

 

Linux


cisconz
1250 posts

Uber Geek

Trusted
Lifetime subscriber

  #1997093 16-Apr-2018 14:26
Send private message

Would they not then have Nitrous Oxide in them?





Hmmmm


 
 
 
 




4690 posts

Uber Geek

Trusted
Subscriber

  #1997094 16-Apr-2018 14:27
Send private message

Brilliant, thanks. If they'd asked me if I wanted a nitrogen fill then I would have told them not to bother, but I only just noticed today that they have replaced the valve caps with new ones that have 'Nitrofill' or something like that so I'm assuming a nitrogen fill is what they've done.


1822 posts

Uber Geek

Trusted
Lifetime subscriber

  #1997117 16-Apr-2018 14:39
Send private message

keep in mind the air we breath is 78% nitrogen already, did they evacuate all the air out of the tyre before filling with nitrogen? I doubt it. it is all a money making scan, I doubt there would be any noticeable change in performance if the tyres were filled with nitrogen 


1217 posts

Uber Geek

Trusted

  #1997120 16-Apr-2018 14:42
Send private message

cisconz:

 

Would they not then have Nitrous Oxide in them?

 

 

No, a mixture (N and Air), does not suddenly become a compound (N2O) ;-)

 

 





Regards FireEngine


4066 posts

Uber Geek


  #1997125 16-Apr-2018 14:47
Send private message

alasta:

 

Brilliant, thanks. If they'd asked me if I wanted a nitrogen fill then I would have told them not to bother, but I only just noticed today that they have replaced the valve caps with new ones that have 'Nitrofill' or something like that so I'm assuming a nitrogen fill is what they've done.

 

 

Or done the green cap trick and charged you $10/tyre for the air experience :)


1844 posts

Uber Geek

Trusted
Subscriber

  #1997128 16-Apr-2018 14:49
Send private message

FireEngine:

 

cisconz:

 

Would they not then have Nitrous Oxide in them?

 

 

No, a mixture (N and Air), does not suddenly become a compound (N2O) ;-)

 

 

 

 

Someones laughing all the way to the bank :-)





My thoughts are no longer my own and is probably representative of our media-controlled government


 
 
 
 


3372 posts

Uber Geek

Subscriber

  #1997143 16-Apr-2018 14:59
Send private message

I'd change the caps to ordinary black as the green might be like the old gypsy mark that labelled you as a soft touch. You might get less upselling 😉

5823 posts

Uber Geek


  #1997144 16-Apr-2018 15:01
Send private message

gregmcc:

 

keep in mind the air we breath is 78% nitrogen already, did they evacuate all the air out of the tyre before filling with nitrogen? I doubt it. it is all a money making scan, I doubt there would be any noticeable change in performance if the tyres were filled with nitrogen 

 

 

Every time I buy new tyres I get the choice of air or nitrogen for no extra cost.  Free top ups too.  Not much of a money making scam ...

 

If you fit new tyres they contain air at 15psi.  If you pump then up to 30 PSI with N, half the new gas is N.  So the resulting gas mix is ~90% N.

 

I did an limited experiment where I filled one side of my boat trailer (tandem) with nitrogen.  So that's one tyre on each axl with nitrogen and one with air.  Identical tyres.  Identical age.  All tyres to inflated to 43psi.

 

After six months there was a couple of psi difference.

 

That's a high load, with reasonably high pressure (over 45psi at highway temp) so maybe not applicable in all situations.  But enough for me to get the air side replaced with nitrogen.





Mike

5823 posts

Uber Geek


  #1997155 16-Apr-2018 15:16
Send private message

To answer the OP's question - yes you still need to check you tyre pressure.  You can get a little handheld tyre meter for very little cost.

 

Usually whoever sold you the tyres will top up the nitrogen for you for free.





Mike

3372 posts

Uber Geek

Subscriber

  #1997177 16-Apr-2018 16:00
Send private message

MikeAqua:

I did an limited experiment where I filled one side of my boat trailer (tandem) with nitrogen.  So that's one tyre on each axl with nitrogen and one with air.  Identical tyres.  Identical age.  All tyres to inflated to 43psi.


After six months there was a couple of psi difference.


That's a high load, with reasonably high pressure (over 45psi at highway temp) so maybe not applicable in all situations.  But enough for me to get the air side replaced with nitrogen.



Just to clarify, did you fill one side with nitrogen or 1 tyre on each side? Usually the tyres on the left get a harder time with more potholes and road debris. If you'd left that side filled with air the experiment might be biased.

In any case even though I haven't had a puncture in over 10 years I still regard nails and screws as more of a problem than slow leaks. Having nitrogen wouldn't reduce the amount of checking.

3833 posts

Uber Geek

Lifetime subscriber

  #1997187 16-Apr-2018 16:41
Send private message

I did the arithmetic on the gases (from memory of 1977 58.201 Inorganic Chemistry IIRC) and there's not much difference in leakage rate between air and nitrogen. The most important thing about nitrogen is that it is dry; in air-filled tyres water will condense and evaporate depending on temperature, and therefore the pressure may vary. A little.

 

 




4690 posts

Uber Geek

Trusted
Subscriber

  #1997208 16-Apr-2018 17:39
Send private message

Thanks everyone. Based on the previous thread on this topic I wasn't hoping for or expecting any benefits from the nitrogen fill - I just wanted to clarify the maintenance side of things. It sounds like I'm fine to do what I've always done in terms of monitoring pressure and topping up with air as necessary.


314 posts

Ultimate Geek

Subscriber

  #1997255 16-Apr-2018 19:44
Send private message

For what it's worth, I'd never pay for nitrogen fill, having said that, one of our car got free nitro fill with the new tires purchase and found them to require less top up (with regular air) than the other car with similar pressure and weight.

A quote from an article:
A 2007 Consumer Reports study compared air-inflated tires and nitrogen-inflated tires to see which lost pressure more quickly and whether the difference was significant.

The study compared 31 different automobile models with tires inflated to 30 psi. They followed the tire pressure for a year and found air-filled tires lost an average of 3.5 psi, while nitrogen-filled tires lost an average of 2.2 psi. In other words, air-filled tires leak 1.59 times more quickly than nitrogen-filled tires.

https://sciencenotes.org/nitrogen-versus-air-better-tires/

They'll still need top up eventually, just maybe a bit less often?

3885 posts

Uber Geek


  #1997259 16-Apr-2018 19:53

frankv:

I did the arithmetic on the gases (from memory of 1977 58.201 Inorganic Chemistry IIRC) and there's not much difference in leakage rate between air and nitrogen. The most important thing about nitrogen is that it is dry; in air-filled tyres water will condense and evaporate depending on temperature, and therefore the pressure may vary. A little.


 



The air compressor at the tyre workshop is almost certain to run at a much higher pressure than what car tyres are normally pumped up to. Most of the moisture would condense into the bottom of the air storage tank on the compressor. As increasing the air pressure causes the moisture to condense out.

So although workshop compressed air won't be 100% dry. It would still be dryer than ambient air.

And the outside of the tyres would always get exposed to far more moisture anyway.






 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic




News »

Freeview On Demand app launches on Sony Android TVs
Posted 6-Aug-2020 13:35


UFB hits more than one million connections
Posted 6-Aug-2020 09:42


D-Link A/NZ extends COVR Wi-Fi EasyMesh System series with new three-pack
Posted 4-Aug-2020 15:01


New Zealand software Rfider tracks coffee from Colombia all the way to New Zealand businesses
Posted 3-Aug-2020 10:35


Logitech G launches Pro X Wireless gaming headset
Posted 3-Aug-2020 10:21


Sony Alpha 7S III provides supreme imaging performance
Posted 3-Aug-2020 10:11


Sony introduces first CFexpress Type A memory card
Posted 3-Aug-2020 10:05


Marsello acquires Goody consolidating online and in-store marketing position
Posted 30-Jul-2020 16:26


Fonterra first major customer for Microsoft's New Zealand datacentre
Posted 30-Jul-2020 08:07


Everything we learnt at the IBM Cloud Forum 2020
Posted 29-Jul-2020 14:45


Dropbox launches native HelloSign workflow and data residency in Australia
Posted 29-Jul-2020 12:48


Spark launches 5G in Palmerston North
Posted 29-Jul-2020 09:50


Lenovo brings speed and smarter features to new 5G mobile gaming phone
Posted 28-Jul-2020 22:00


Withings raises $60 million to enable bridge between patients and healthcare
Posted 28-Jul-2020 21:51


QNAP integrates Catalyst Cloud Object Storage into Hybrid Backup solution
Posted 28-Jul-2020 21:40



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.