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    Thread: Ideal Tyre Pressure

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      Vinosh Sam's Avatar
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      Ideal Tyre Pressure

      Hi all,

      I have been reading a lot on the forum about whether to fill nitro or air for tyres and finally gave up spending Rs.40 everytime for nitro and started filling normal air...I dont wanna open a new thread for the same but would like to know what the ideal air pressure would be for a Swift Vdi running on 195/60 R15 tyres...When I used to fill nitro it used to be 32psi always...Eventhough the ride was confortable the tyres looked underinflated and the naming on the rubber scratching roads all the time.Once tried to fill 33psi for front and 32psi for rear with normal air, but was like swagger jagger song all the way.

      So what is the ideal pressure that you guys set??...Hope this thread can also be used for ideal tyre pressure of other vehicles.
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    2. #2
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      how old are said tires? 195 60 will have massive sidewalls and therefore greater sidewall flex and maybe that is why you see it buckle and feel it flex. coming to your question, the ideal tire pressure is where you feel safe and comfortable. Id say get a portable inflator, a tire pressure gauge, choose an empty piece of road, keep upping the tire pressure by 1 psi all around, drive a little and evaluate.

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      Tyre pressures are purely an experiment. There is no set rule. Keep varying it and settle on what suits you best.

      On the Cruze, I found 28psi to be the correct pressure at which grip & ride had a good trade off. Moved it to 32psi recently, the ride is quite uncomfortable now. Going to switch back to 28psi next time I visit the petrol pump.

      So try different pressures. Try 28, 30, 32, 34. See at what psi you feel comfortable. Then at that point, increase/decrease 1psi & note the difference again!
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      Quote Originally Posted by Vinosh Sam View Post
      Ideal Tyre Pressure
      Recommended pressure would be printed on the tyre itself. Reduce 2-3 psi and you're ready to roll.

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      On my XYLO, 35 is recommended if only 2 guys sit inside the car and 40 when 7 guys with Load.

      For City driving I usually keep 35 and for my trip I keep 37 and I happy with the drive
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      Quote Originally Posted by 007 View Post
      how old are said tires?
      Almost an year now..

      Also I hear from a lot of people that the front tyres need to have increased pressure for diesel engines...Tried it only once and didnt feel stable...Is that true?
      Last edited by Vinosh Sam; 11th Jan 2012 at 21:03.
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      Quote Originally Posted by Vinosh Sam View Post
      Almost an year now..

      Also I hear from a lot of people that the front tyres need to have increased pressure for diesel engines...Tried it only once and didnt feel stable...Is that true?
      makes sense because diesel engines are way heavier than petrols. hence the need for stiffer springs and greater tire pressure to support the increased weight.

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      Quote Originally Posted by mclaren1885 View Post
      Going to switch back to 28psi next time I visit the petrol pump.
      You don't have a portable inflator?

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      007, any specific metrics on the difference between the front an rear in that case??...cos as i mentioned earlier 33 front and 32 rear was not comfortable...the ride was too bumpy...
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      Quote Originally Posted by Vinosh Sam View Post
      007, any specific metrics on the difference between the front an rear in that case??...cos as i mentioned earlier 33 front and 32 rear was not comfortable...the ride was too bumpy...
      sorry Vinosh, dont have any specific metrics. check out the manufacturer recommendation for front and rear tire pressures and notice the difference between the two. try to maintain that difference.

      if the ride is too bumpy, you are most likely on the harder side. try deflating a psi or two and recheck.

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