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Tyre pressure

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

  1. sungoa2010

    sungoa2010

    Messages:
    2,878
    Goa
    Nitrogen filling station is 10 km from my home. Sticker says 32 Psi on all tyres in my GP 1.4 E. What should be the correct pressure that I need to fill?. Some where in the forum it is mentioned that for Nitrogen the pressure should be 1-2 units less. So should I stick to 34 on all tyres at filling station(10 km away)? Also the manual says the front and back should have different tyre pressure according to the load. Which is correct? Why they mention, all tyres should have equal pressure on sticker on front door side?
    Does the foot pump work for pressure top up in cars?
  2. yes the foot pump works for toppingup but only if you use air.
    there is jno point filling nitrogen going 10km far and topping with air..
    i use normal air.
    33 in the front
    31 in the rear. the ride seems to be perfect..
  3. sungoa2010

    sungoa2010

    Messages:
    2,878
    Goa
    Thanks Srikaratluri.
  4. livelyyoungman

    livelyyoungman Regolare

    Messages:
    428
    Chennai
    Chennai
    Linea 1.3
    For the last few months I have gone upto 35PSI be it cold/warm. Not felt any difference in ride/grip in my Linea.
  5. gurjinder

    gurjinder Staff Member Janitor

    Messages:
    3,989
    Punjab
    Guys, a moot point. I've been running the 33 psi as specified(Linea MJD). And i can see that the tire contact patch is nice and even.

    On increasing pressure, say to 36 psi , or any value above recommended,wouldn't the contact patch be a bit altered. We may increase GC ( negligibly), or marginally increase FE, but what about uneven tire wear.

    The diagram can make my point a bit clear-er.

    tire-problems.jpg
    Last edited: May 31, 2011
  6. livelyyoungman

    livelyyoungman Regolare

    Messages:
    428
    Chennai
    Chennai
    Linea 1.3
    You are correct. It is likely to have a bearing on the tyres. But I felt it is better to get the tyres to get the beating rather than the under chassis.
  7. Cinju

    Cinju Esperto

    Messages:
    1,333
    Trivandrum
    I think we should maintain the correct pressure maybe +- 1. Not more than that. As gurjinder has pointed out there may be uneven tyre wear. Apart from that if you over inflate the ride would be more bumpy and the suspension may have to slightly over work .(Plse correct me if I am wrong..)
  8. gurjinder

    gurjinder Staff Member Janitor

    Messages:
    3,989
    Punjab
    You're right Cinju.

    Over inflated tires will reduce the cushioning provided by the tires and hence transmit more shocks to the suspension ;possibly harming it in the long run and making the ride that much more uncomfortable.

    Better option is to go for 195 65R15 rubber.
    And enjoy better ride and a bit more GC than stock.

    Gurjinder.
  9. sungoa2010

    sungoa2010

    Messages:
    2,878
    Goa
    You are correct Gurjinder. During my last week I got top up from local shop and he filled up to 36 psi. The ride was very bumpy and I was suspecting the suspension of Punto. When reduced it to 32 the ride came back to normal.
  10. HarishSegar

    HarishSegar

    Messages:
    141
    Mumbai
    I always had this crazy query on tyre pressure related to load. Here it goes:

    Linea Tjet Manual says - 36/33 when heavy and 33/30 when light. Assuming i fill up at cold pressure, how does the measurement work.

    36/33 with load. i.e., by making sure the car has the load it is supposed to have. In case of 5 people, put them in the car while filling up.
    (or)
    36/33 keeping the car empty but anticipating the load. In case of 5 people, get them out of the car and fill up.

    33/30 with the driver in the car (or) without

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