"It's not about the nitrogen. It's about reducing oxygen, water vapor and other gases.

By reducing the percentage of oxygen, water vapor and other gases in your tires from 22% to 7% or lower, your tires will maintain proper pressure longer than if you use “plain old air.” For example, with 95% nitrogen in your tires, they retain optimal pressure three to four times longer."

This is becoming very popular over here in the USA and I beleive it does off a better ride quality.

Sexy Pauly wrote:

new nissan GTR has it, doesnt expand and contract as much, stays harder, longer... bit like viagra... aparently

Maybe I'll need to put some Viagra in the STRUT wheels for you Sexy Paul !! Be carefull next time OK buddy, 3 peiece wheels do not like pot holes !!

StrutRR, is that a Revere RRS in your avtar??

No that was the official STRUT Owned Range Rover Sport with Carbon Fiber collection on and 22" Icon 7 Wheels.

That has now been sold and just bought the new 2010 Range Rover Supercharged

Nice...with your gas prices, everyone RRS should be a S/C. they still do the 4.4 model in the US still? Where in CA are you mate?

Strut RR are you sure its not KAHN car? looks very similar! those wheels look like they are made of plastacine!

 RR Sport supercharged 06
strut grills, strut 22" wheels, Full Kahn Kit
Brembo big brake kit, tinted front and rear lights

CLS 63 AMG Mercedes 2008, Cayenne Turbo S 2007, C32 AMG mercedes 2004, Vito Van 111CDI 2004

So can you buy Nitrogen gas bottles to keep at home should the pressure drop or have you got to find a garage to pump your tyres up

You just know you're going to have the problem when the garage is shut..........  TDV6 - gone
TDV8 - gone
Audi Q5 3.0 Tdi Sline wef 6/11/10

quick fit aparently do it now... RR Sport supercharged 06
strut grills, strut 22" wheels, Full Kahn Kit
Brembo big brake kit, tinted front and rear lights

CLS 63 AMG Mercedes 2008, Cayenne Turbo S 2007, C32 AMG mercedes 2004, Vito Van 111CDI 2004

I looked into the whole Nitrogen thing and was left feeling it is a bit of a con - certainly won't do any harm but I think all the advantages claimed don't stand up to a whole lot of scrutiny:

F1 cars use them - and gain a few hundreths of a second, not really going to make any difference to you and I.

They use it in aeroplane tyres - plane tyres have to undergo massive temperature and pressure differences as well as extreme stress on landings. The small amount of moisture present in air-filled tyres could be an issue at altitude as it could lead to ice crystals developing in the tyres and other pressure- and temperature-related issues. Again, not a factor for a land-based vehicle.

They stay inflated for longer - people do claim this, but there's no scientific reason why they should from what I understand.

They reduce corrosion of the from within the tyre - Tyres get worn from the outside at a much faster rate! With no UV light damage occurring inside the tyre and the only aggressive agent in there being air, it's going to be decades before there's any measurable decay inside the tyre. By which time the outside of the tyre will be severely affected by exposure to light and the air around it, never mind the fact that you're probably going to wear your tyres away after 2-3 years anyway.

A couple of things to remember - air is 80% nitrogen anyway, so you've already got mostly nitrogen in your tyres. Also, deflating your tyres will leave about 10-20% of the air inside them, so then filling them with nitrogen will only give you about 95% nitrogen compared to the 80% you had in there in the first place.

Personally, I'm not convinced that you get anything for what you pay. Alfa Romeo Giulietta 1.8::MG Montego Turbo::MGB GT::Rover Sterling::MGF::MG ZT 190+
Discovery Series II Td5 GS::Discovery 3 TDV6 S::Freelander 2 TD4 XS::Freelander 2 TD4 SE
Range Rover Sport TDV6 3.0

I run my M3 on N2, cost me £1 a corner for initial inflation i have been back to have them checked and pressures have remained constant for 6 months.

Apparently for performance cars it is more reliable as there is less fluctuation in pressure due to heat etc. In a RRS i wouldn't imagine many benefits except for you should expect your tyre pressures to remain constant.

KiwiRRS wrote:

"It's not about the nitrogen. It's about reducing oxygen, water vapor and other gases.

By reducing the percentage of oxygen, water vapor and other gases in your tires from 22% to 7% or lower, your tires will maintain proper pressure longer than if you use “plain old air.” For example, with 95% nitrogen in your tires, they retain optimal pressure three to four times longer."

NightFox wrote:

…air is 80% nitrogen anyway, so you've already got mostly nitrogen in your tyres.…

The appliance of science.

mmmm sounds like a plan to me..might have to get some.

Mine are now filled with 100% Nitrogen (Kwik Fit)

I was advised that other than the more constant tyre pressures the gas was friendlier to the alloy wheel itself? RRS gone
Audi SQ5...Gone Audi Q7 S-Line 240 3.0TDI Gone
Audi A6 Allroad Sport 270 3.0TDI