anyone used it in their tyres ?

Nope, don`t even use Genuine Harley Davidson air in my tyres.

it keeps the tyres running at a cooler rate too

Hmmm...

Does anyone have problems with their tyres deflating with ordinary air?

Does anyone have problems with their tyres running too hot with ordinary air?

Yeah, well ordinary air is nearly 80% nitrogen. I haven't been able to find any definitive tests to show N2 is better. It's all people's opinion. N2 is so close to O2 in physical properties that there can't be much in it (nitrogen is next to oxygen on the periodic table).

One possible reason for using N2 is that it's dry. Ordinary air from a compressor (without a drier) does contains some moisture. But moisture isn't a problem on the outside of my tyres, so why should it be on the inside?

Another possible reason for using it is that you can be CHARGED for a fill-up.... now we're getting close....

Gonzo.

Most people at the track have there own cylinder, they use it in air shifters and there tyres, but mostly the people that do high speeds. not me i've always used my compressore as i'm only hitting around 200kph 4th gear. I'm no super star

Hmmmm... again.

The "moisture" argument sounds good, except for this:

1. All gases behave the same with changes in temperature (the Ideal Gas Law)

2. Water vapour is a gas

3. When you compress air into a tank, the air cools and water condenses, the air becomes SATURATED, and water collects in the bottom of the tank. You then draw off the air through a regulator into your tyres at a LOWER pressure than the tank, and without the water that's been condensed. So the air is drier (further from the dewpoint) than it was.

4. If you then cool the tyres sufficiently, you may be able to condense out more moisture. However, tyres heat up when used, so the chances of moisture condensing is bugger-all.

5. Therefore, since there is water VAPOUR (which is a gas) in the tyres, not water droplets, the pressure-temperature curve should be the same as for any other mixture of gases. In other words, ANY mixture of gases (within reason) should behave the same in your tyres.

6. I think they use N2 because it's the cheapest gas you can buy in a bottle.

Gonzo

No oxygen means no oxidation (corrosion) rims should be as good as new.Maybe reasonable explanation?

hey, ... what colour would the skidmark be if you used methane gas ....... lol , could be a bit dangerous doing a burn-out, only joking,

Hmm... again again.

Interesting article Magilla. Yeah, if you've got a race car and want to control stuff down to the minutest detail, or if you've got a 747 and have 230psi in the tyres, I can see that nitrogen might be useful. OR, of you've got truck tyres which you want to RETREAD (see article) then stopping the steel bands from rusting would be a good idea.

However,
1) I have a bike with tubed tyres with air (with moisture) on both sides.
2) My tyres will never be retreaded, and
3) I go through them faster than they can ever get brittle.
4) I've never seen a brittle or oxidised tube

If you want to spend money on nitrogen, go right ahead, but I spent $15 on a set of TyreCheckers so that I can instantly see if the pressure is OK, and then add free air from my compressor if needed.

Gonzo.

mmmm I asked the question because I can get it for free so same price as air

Honestly, stick with good ol' air from the servo. It's free.

I used to baffle the uneducated at the local go-cart club by running N2 in my tyres and they thought I had an edge because of it. In reality, it didn't make any diff. Just thought I would try because the temps were always high when we raced. 35 - 45 ambient. I too was in the belief that it keeps the tyre cooler therefore stops tyre pressures from rising.

Just like V8 supercars and the like, they start with a low pressure and wait until the tyre is at running temp before adjusting to the optimum pressure. (practice sessions) They have data to know where they should be with pressure at any given track temp.

As I said in the last post, PV=nRT is basically the formular that says (as Gonza pointed out) all gasses temp up pretty much the same

IMO ain't worth using in bike tyres, as enforcer said you would need to get all the air/moisture out to make it worth while which would be bloody hard to do in a small tyre. I have used it in large dump truck tyres to help maintain consistant pressures in extreme temprature changes, it's also inert so if you have a tyre catch fire it helps minimise the bang when they blow.

Best place for Nitrogen is in Beer (mmmm     Kilkenny !!)