Called into BJ's for a tyre balance and got a nitrogen fill. $5 a tyre, So will see if I notice any difference.
Anyone else been 'foolish' enough to do this?:nuts:

My understanding of nitrogen is that it more or less maintains the same pressure when hot and cold. It doesn't increase when warmed up, like regular air does. That's about the only benefit it offers.

Oh yeah, and the air in the atmosphere is already about 80% nitrogen anyway lol

For a street driven car driven at "normal" road speeds, nitrogen offers no significant, tangible benefit.

Nitrogen also doesn't escape as easily so you don't have to top it up as much as air, still, why the hell would you bother lol

I much prefer the 'free-ness' of filling up with air :D.

Wasted your money imo.

Oh yeah, and the air in the atmosphere is already about 80% nitrogen anyway lol

Oh bother, beat me to it! lol

Latest craze: liquid nitrogen in yr tyres! Stops them catching fire when you do hectic burnouts, so I've been told!

A lot of the pressure change is from moisture vapour in the air turning to steam as it heats up, adding pressure. Using dry compressed air is a lot better than just a bike pump/foot pump/air compressor with no water seperator.
http://www.festo-didactic.com/ov3/media/customers/1100/00842554001097822347.jpg

Filling tires with nitrogen became popular because someone noticed they do that with aircraft tires, and thought that must mean it is a good idea with car tires.

The reasons for filling aircraft tires with pure nitrogen are not applicable for cars (large changes in ambient atmospheric pressure, extreme temperature changes etc etc.)

It is largely a waste of time/money for road car tires.

More about Nitrogen not reacting with the rubber, as oxygen does, so tyres/tubes last longer. More beneficial in high temp environments (eg Dubai) where average temps are very high and the O2 / rubber reaction (effectively slow burning) is greater at the higher temps. Oxidation of rubber leads to (in extreme cases) of crumbling/powdering of the tyre / tube structure and eventually pressure loss or failure

The reaction of O2 and rubber sounds more likely, considering all gasses obey the same idea gas laws and expand and contract by the exact same amount for a given temperature change. P1/T1=P2/T2.

More about Nitrogen not reacting with the rubber, as oxygen does, so tyres/tubes last longer. More beneficial in high temp environments (eg Dubai) where average temps are very high and the O2 / rubber reaction (effectively slow burning) is greater at the higher temps. Oxidation of rubber leads to (in extreme cases) of crumbling/powdering of the tyre / tube structure and eventually pressure loss or failure.

I've heard that argument before and don't agree with it *ducks for cover*. Unless you do less than 2500km per year in your car with 50,000km rubber (ie 20 years!), the tread will be gone before there is any significant effect of oxygen on the rubber structure.
How does the outside of the tire get protected from oxygen?

How does the outside of the tire get protected from oxygen?

I too am interested to hear... :doubt:

I've heard that argument before and don't agree with it *ducks for cover*. Unless you do less than 2500km per year in your car with 50,000km rubber (ie 20 years!), the tread will be gone before there is any significant effect of oxygen on the rubber structure.
How does the outside of the tire get protected from oxygen?

The air on the inside is at high pressure so temp and pressure increase the reaction rate, as well as pressure forcing O2 into the molecules of the rubber from inside towards outside.

Interstingly I spent the last few years in Dubai UAE where summer temps are 45 - 50 C with lots of accidents due tyre failures. RWC requirements there limit age of tyre to about 5 (?) yrs from build date which is encoded into stamping on tyre if you know how to read it. N2 was very common there and u could usually do a deal to get it free if you bought 4 tyres at once