smirnoff_rules

Nitrogen Tyre Inflation


Claims



Nitrogen filled tyres hold their pressure for longer than normal air
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wrong (as far as tubeless car tyres are concerned)

Research Data from Dupont shows that although Oxygen is the heavier element it does leak through a porous rubber membrane faster than Nitrogen, but the rate for both gases or a mixture within a tubeless rubber tyre which has an IMPERVIOUS liner is so slow that it would take SEVERAL YEARS for all the oxygen in an air filled tyre in good condition to leak away: though greater leaks can occur around the rim-to-bead seat - so the answer here is to ensure the tyre is properly fitted and sealed.

Many tyres used in the earthmoving and mining industries still use tubes in which case the leakage data and benefits of Nitrogen may be more relevant.


do The inner lining of the tyre and the wheel do not become oxidised or corroded or perish if filled with Nitrogen

wrong

Given the average life span of a normal car tyre is 2 to 5 years, depending on use, and the average life of a vehicle is 10 to 15 years, the amount of corrosion of the wheel or degradation of the inner tyre lining from the oxygen in the air is not measurable. The only time significant attack to the wheel is likely is if the air in it has a very high water content to assist the oxygen in attacking the wheel. In 15+ years of fitting tyres I have never seen a wheel or tyre that has suffered in such a way: but the exposed outer part of the tyre or the external edge rim-to-bead seat may often show degradration. The only advantage of Nitrogen is that it would be dried to remove any surplus water vapour.

Some tyres used in big earth moving equipment are filled with Nitrogen but these tyres are very heavily constructed and so may be remoulded several times in their life span over several years: therefore anything which helps to keep the tyre carcass in good condition is worthwhile given that the tyres can cost several thousand pounds each, and are inflated to much higher pressures than passenger car tyres.

are Nitrogen is more stable at holding it's pressure when the tyre goes through the cycle of cold to hot and back again in normal use.

wrong

Oxygen and Nitrogen and Air all respond in the same way to temperature changes as the tyre heats up and cools down: they all have the same rate of pressure change for an equal amount of temperature change.

Again the only exception would be if very wet air was used to fill the tyre: if the water content was so high that in cold temperatures there was liquid water in the tyre which could turn to water vapour when the tyre heated up. This would cause an uneven pressure gradient in respect of temperature: effectively a very small amount of water would turn into a large amount of steam within the tyre casing. In normal use (at least in my tyre depots) the air-lines are fitted with water traps to remove excess moisture from the compressed air


are Car manufacturers still use compressed air when making new cars

yes

See the reference to Vauxhall cars. They do not disapprove of Nitrogen but do not seriously endorse any of the claimed benefits.

wot vauxhall say

http://www.gmfleet.com/pdf/TechTip_0...itrogenGas.pdf

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Curly

It used to be free to pump your tyres up at our local garage, now it costs 20p !!!!

Feckin inflation


Curly

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IANB

Taxi for Curly ..........Quick

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No longer homeless

Bronto

That one let you Down curly .. Groan

I'll get in the Taxi with you pmsl

Seedy_r0m

Now Helium...that's the stuff of the future.

Heli-Tyres ™

Create bigger tyres, fill them with enough Helium to float the car, install a rudder type steering device to the rear & strap on some sort of air-scoop device to the tyres. (Pat. Pending)

Dismounting could be some form of ladder, or re-usable parachute.

mozr

Why not use hydrogen.

Then when some prick cuts me up I can shoot his tyres and turn his car into a mini hindenburg!

Or helium, if you like seedy's mad flying car idea, and not my 'hate everyone' theorem.

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Seedy_r0m

You could still shoot the tyres on a car with Heli-Tyres™ installed.

But as you start shouting abuse at the guy who shot them, you would inhale more & more Helium, thus slowly turning you into an irate Donald Duck soundalike.

Road Rage would be a thing of the past as everyone around would crumple into heaps of laughter...

Until someone in a Hydro-Tyres™ car comes along and incinerates the assembled giggling crowd.

Dingodog

[quote=smirnoff_rules;1367989]Nitrogen Tyre Inflation


Claims



"Oxygen and Nitrogen and Air all respond in the same way to temperature changes as the tyre heats up and cools down: they all have the same rate of pressure change for an equal amount of temperature change.

Again the only exception would be if very wet air was used to fill the tyre: if the water content was so high that in cold temperatures there was liquid water in the tyre which could turn to water vapour when the tyre heated up. This would cause an uneven pressure gradient in respect of temperature: effectively a very small amount of water would turn into a large amount of steam within the tyre casing. In normal use (at least in my tyre depots) the air-lines are fitted with water traps to remove excess moisture from the compressed air."

All too true smirnoff just a big con, as for the above thats why they've been puttin it in aircraft tyres for feckin years.

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