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Tyre pressure

Discussion in 'Tyres & Alloys' started by Chaos, Jun 1, 2010.

  1. theblack

    theblack Esperto

    Messages:
    2,188
    Bangalore
    Soft compound tyres or hard compound tyres
  2. caffeineam

    caffeineam Amatore

    Messages:
    217
    Mumbai
    For what it's worth, found this is in eLearn for Linea
    Pressures.png
  3. royj

    royj Esperto

    Messages:
    1,306
    Trivandrum
    In my understanding, the tyre compound doesn't have any input in deciding on the tyre pressure.
  4. ganesh.g1982

    ganesh.g1982 Novizio

    Messages:
    45
    Bangalore
    Bangalore
    Grande Punto 1.3
    Shall we stick to the same psi level of normal when filling nitrogen as well? I read in a thread where it was mentioned to fill less psi when filling nitrogen.
  5. VahanPujari

    VahanPujari Staff Member Janitor

    Messages:
    2,303
    Mumbai
    This is exactly what is mentioned in my 2009 Linea Owners Manual as well.
  6. gurjinder

    gurjinder Staff Member Janitor

    Messages:
    3,989
    Punjab
    Pressure is pressure. Nitrogen or "normal air".

    Although i do not know if there's another myth associated with this as well. :confused:
  7. PatchyBoy

    PatchyBoy Esperto

    Messages:
    2,438
    Bangalore
    What is mentioned in the manual is cold tire pressure for normal compressed air.
    Normal air expands more than nitrogen, when the tyres get hot
    So, if one fills 33 psi normal compressed air, when the tyre gets hot, it will likely go up by 3 to 4 psi.
    However, if one fills nitrogen, then even after the tyre gets warm / hot, the pressure would at best go up by 1 psi

    Ergo, if you are filling after a drive long enough to get the tyres warm, you will need to fill 36 or 37 psi of compressed air to get 33 psi cold tyre pressure. With nitrogen, you may need to fill only 33 psi, under same circumstances.

    Disclaimer:
    All of this is theory and I am yet to see any concrete proof of the benefits of using nitrogen. On the contrary, I have seen that the readings of TPMS for a car with 2 tyres filled with nitrogen and the other 2 with compressed air did not show any difference. Maybe the nitrogen was not pure. I don't know. I am sticking with compressed air.

    Rajan
    Last edited: Jan 5, 2013
    1 person likes this.
  8. varin11

    varin11 Superiore

    Messages:
    821
    Mumbai
    Bombay
    Linea 1.3
    No use of nitrogen,i feel normal air is better , also its free and freely available.I fill 34 psi in front and 32-33 rear
    Last edited: Jan 18, 2013
  9. Sachin kashyap

    Sachin kashyap Timido

    Messages:
    6
    Gurgaon
    Gurgaon
    Grande Punto 1.3 90 HP
    Hi Guys ...

    Needed some advice on tyre pressure.I have a Punto 90hp with 195 tyres

    Pals suggest what should be the pressure to be maintained for nitrogen.

    The place where i got nitrogen filled suggested me to keep 40 for good mileage and tyre life.

    The logic given by him was at high way the pressure of air increases to 40 from 32(when inflated with air )
    Incase of nitrogen the pressure remains the same so its good to keep 40.

    Currently i am using 32 pressure as per the chart.pls advice..thanks in advance.
  10. ghodlur

    ghodlur Esperto

    Messages:
    2,316
    Thane
    40 is not the correct pressure for the tyres, 32 is perfect even with Nitrogen filled in. Over inflating tyres can cause the tyre damage

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