Spare tyre

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Originally Posted by team_v

Nitrogen filling is a massive waste of time and money.
Regular air is 78% nitrogen

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No way its worth the extra money for the "Racing Red" Valve caps and bottle of snake oil.

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Originally Posted by brad

Your comment about local government is incorrect. Email & telephone notification is perfectly acceptable as is using Snap, Solve, Send! on your smart device. If you look in the annual report for the entity it will even have the statistics on how they have received notifications. Source: Wife has 30 years experience in LG plus numerous friends in LG.

Agree about the notification though - they have to know or they can't fix it.

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Fair enough, however not all councils accept such reporting. The last time I checked, Blacktown did not accept Snap, Send, Solve!. The other thing is that not all roads are the responsibility of the council. In NSW, some are the responsibility of the RMS. I am not sure what their stand is on Snap, Send, Solve!

Quote:

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Originally Posted by team_v

Nitrogen filling is a massive waste of time and money.
Regular air is 78% nitrogen

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Yeah I loved the 4wd'ers who raved on about how good their trucks went on Nitrogen but what happened when they aired down on a beach or similar. Did they carry a cylinder of nitrogen to reinflate.

The only thing that needs it is an aeroplane as Nitrogen is inert and doesnt pressure up at altitude. So unless you are going to drive above 10000ft its a waste of money ROFL

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Originally Posted by Hillbilly

Yeah I loved the 4wd'ers who raved on about how good their trucks went on Nitrogen but what happened when they aired down on a beach or similar. Did they carry a cylinder of nitrogen to reinflate.

The only thing that needs it is an aeroplane as Nitrogen is inert and doesnt pressure up at altitude. So unless you are going to drive above 10000ft its a waste of money ROFL

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It gets used in F1 as well but they have double valved tyres and are running at crazy parameters where hundreths of a second count.

The primary reason for its use on aircraft is safety, as nitrogen does not support combustion.

Nitrogen, like other gases, follows the ideal gas laws - that is, pressure is directly proportional to temperature for a fixed mass and volume (for instance, the inside a tyre, which is close enough).

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Originally Posted by Hillbilly

The only thing that needs it is an aeroplane as Nitrogen is inert and doesnt pressure up at altitude.

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Originally Posted by Diesel_vert

The primary reason for its use on aircraft is safety, as nitrogen does not support combustion.

Nitrogen, like other gases, follows the ideal gas laws - that is, pressure is directly proportional to temperature for a fixed mass and volume (for instance, the inside a tyre, which is close enough).

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Both are correct.

Plus, when using Nitrogen, you don't get a chunk of ice forming in the low point of tyre causing a massive wheel imbalance / flat spot on landing.

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Originally Posted by Diesel_vert

The primary reason for its use on aircraft is safety, as nitrogen does not support combustion.

Nitrogen, like other gases, follows the ideal gas laws - that is, pressure is directly proportional to temperature for a fixed mass and volume (for instance, the inside a tyre, which is close enough).

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Correct. The only difference pure nitrogen will make is the 22% left over. Which has 20% O2 and then everything else. Pure Nitrogen is supposed to minimize the amount of "air" lost through the rubber as well as be more stable as temperatures change. Considering the mass of O2 is greater than Nitrogen, the molecules are bigger so less will be lost through the walls anyway.

Yes O2 is combustible or provides the combustion of other materials, so you remove that from the equation in a plane.

In F1, they are concerned about that 2% that is left over. Hence the desire for a pure gas in the tyres for a level baseline and to remove outside factors well looking for 100ths of a second.

If they are filling the tyres for you with Nitrogen, do they extract all the air in the tyres first to crate a vaccuum then fill with Nitrogen? If not then you still have a component that is not pure Nitrogen anyway. Just a larger percentage of Nitrogen per volume.

If you really want better performance from your tyres, forget nitrogen, instead regularly check the pressures with a non-service station pressure gauge. Always use the same gauge for consistency and alter accordingly. Bearing in mind outside air temp, driving distance and speed will all affect the pressure.