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Thread: Nitro inflation

  1. #1
    Regular Member Graham's Avatar
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    Default Nitro inflation

    Took my car to the garage yesterday to get my tyres fitted i bought from mytyres.co.uk mitchelin 225/45/17 pilot primacy.

    Told to come back in a few hours cos they were busy.When i came back they were ready and charged me £22 for tyre swop and new valve and ballancing.

    Fitted them to my car at home then pumped them up to 45psi cos im towing my caravan at the weekend. Ithen looked at my receipt the garage gave me and hed charged me nearly £4 to inflate them with nitrogen.

    But by know i have already added extra air to them at home.

    So what are the pros and cons of nitro and does it matter if you add air to them?

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    Putting air into nitrogen filled tyres is perfectly OK matey.

    Tyres filled with Nitrogen perform better and don't need topping up so much, so you're quids in.

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    Regular Member Brocks's Avatar
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    Perform better in what way Alex? Wear, Noise grip?

    Surprised they don't need topping up so much...Air is 98% Nitrogen isn't it.

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    Compressed air – the traditional medium for inflating car tyres – contains both oxygen (21%) and nitrogen (78%). A rubber tyre is like a membrane, through which oxygen permeates three times faster than nitrogen.

    As a result, the oxygen slowly leaks out through the rubber walls, which leads to under-inflation. This in turn leads to higher tyre wear, decreased safety and comfort, and higher fuel costs. In addition, compressed air contains high levels of moisture, which can accelerate the corrosion of the tyre rim.

    Nitrogen is used in tyres to avoid air leaking through the tyre wall, which results in under-inflation. The reason why nitrogen is used is because it is easy to produce, does not support combustion, has no smell and is also a component of atmospheric air.

    The difference between the pressure in a tyre and the pressure outside, causes oxygen to permeate through the tyre. If we can create the same concentration of oxygen inside and outside a tyre (equal partial pressure) then oxygen is not forced to leak through the tyre wall.Using nitrogen in tyres maintains the correct pressure, and reduces all the problems associated with under-inflation.

  5. #5
    Regular Member ion's Avatar
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    Wow live & learn eh?

    Nice one Alex, very informative.

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    Regular Member Graham's Avatar
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    Quote Originally Posted by AJA
    Compressed air – the traditional medium for inflating car tyres – contains both oxygen (21%) and nitrogen (78%). A rubber tyre is like a membrane, through which oxygen permeates three times faster than nitrogen.

    As a result, the oxygen slowly leaks out through the rubber walls, which leads to under-inflation. This in turn leads to higher tyre wear, decreased safety and comfort, and higher fuel costs. In addition, compressed air contains high levels of moisture, which can accelerate the corrosion of the tyre rim.

    Nitrogen is used in tyres to avoid air leaking through the tyre wall, which results in under-inflation. The reason why nitrogen is used is because it is easy to produce, does not support combustion, has no smell and is also a component of atmospheric air.

    The difference between the pressure in a tyre and the pressure outside, causes oxygen to permeate through the tyre. If we can create the same concentration of oxygen inside and outside a tyre (equal partial pressure) then oxygen is not forced to leak through the tyre wall.Using nitrogen in tyres maintains the correct pressure, and reduces all the problems associated with under-inflation.
    Wow thats a very scientific answer. So what your saying is that it stops the natural leakage of air out of the tyres over a period of time.

    Thanks for your answer and everybody elses i can know motor on to cornwall at the weekend knowing that my tyres are ok.

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    Regular Member Brocks's Avatar
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    He's a God for a reason!!!!!!

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    Regular Member The Doc's Avatar
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    Quote Originally Posted by CDTi
    Oi, you, cheeky ferker!

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    [Ex]Admin Duncan's Avatar
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    Quote Originally Posted by Graham
    Wow thats a very scientific answer.
    Not sure which site AJA cut and pasted his from, but for some more stuff on Nitrogen filling, have a peek here.

    D

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