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Old 5th October 2007, 16:33   #1
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Default Swift Tyre Pressure?

Hi,
Noticed someone saying in a different thread the manufacturer recommended trye pressue is only for full load.

I drive a Swift Vxi. Usually with just me & my wife & mostly on the Bombay - Pune highway. What pressure should I keep. I think the manufacturer recommended pressure is 32. Also I always fill air after driving for 45 minutes or so. The recommended pressure is with the car cold. How do I adjust for that? I have stock tyres which come with the
car - less than 6 months old.
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Old 5th October 2007, 16:42   #2
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Company recommended pressure is 33psi
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Old 5th October 2007, 16:45   #3
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i am running 30 psi in all four ride is good
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Old 5th October 2007, 18:20   #4
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Another question I would like to add:
What is the effect on ideal tyre pressure when changing the rim/tyre to alloy/tubeless etc or changing the suspensions?
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Old 5th October 2007, 18:27   #5
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It is ok to keep the company recommended pressure. For checking the exact pressure you will have to get yourself a pressure gauge and check the temperature in the morning before driving.

What I normally do is to keep the pressure about 35 when topping up on hot tyres. Then in the morning once the tyres have cooled down the actual pressure will be set to 29 which is recommended for my ZXi.

@amohit - Even when you chaning your tyres you should normally stick to company recommended values. But if you changing your suspension setup then you will have to set it as per how you like the ride whether soft or hard.
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Old 5th October 2007, 18:43   #6
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I put 29 in front and 28 at rear. i have upsized tyres 185/70 R14 Goodyear NCT5. And I feel it is still bumpy at times however anything lower than this the car tends to drag a bit. I have experimented with tyre pressure for a long time and this is what is really comfortable. There was a tyre dealer who suggested that whatever tyre pressure is stable (Does not bump or doesnt not drag ) should be used as perfect tyre pressure for your car at the weight.
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Old 5th October 2007, 19:42   #7
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Quote:
Originally Posted by vikram_d View Post
It is ok to keep the company recommended pressure. For checking the exact pressure you will have to get yourself a pressure gauge and check the temperature in the morning before driving.
Usually I fill air 45 minutes after I start driving & continue driving for
another 2 hours immediatelly after driving. So really no point in me
checking the pressure next morning? What should be the ideal pressure
in my situation - more than the recommended pressure or less than the
recommended pressure.
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Old 5th October 2007, 19:45   #8
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I am a little confused by your statements? Pls clarify.
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Old 5th October 2007, 19:47   #9
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I drive with 2 psi less than prescribed level in city with my ZXI, FE suffers by .5 Kmpl but ride quality is better.
Make sure you have the recomended pressure when you drive on highways.
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Old 5th October 2007, 19:49   #10
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1. Always check pressure in cold tire condition.

2. Fill 1-2 PSi more if going for a highway trip, or lugging loads.

3. Mfg recommended pressure is for ideal load, i.e. 2 passengers, some goods & tankfull of fuel, not for fully loaded condition.
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Old 5th October 2007, 19:51   #11
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Quote:
Originally Posted by vikram_d View Post
I am a little confused by your statements? Pls clarify.
Whose post are you replying to?
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Old 5th October 2007, 20:02   #12
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Your post. The one above mine.
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Old 5th October 2007, 20:08   #13
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Quote:
Originally Posted by vikram_d View Post
Your post. The one above mine.
I drive very little inside Pune City or in Bombay. Once in 15 days or
so, I drive to Bombay & back to Pune.
I drive from Pune & 45 minutes into my drive, I stop at a gas station &
fill petrol & air. i.e. I always fill air when the tyres are hot. And then I drive
for 2 hours more.

The manufacturer says fill 33psi - but this is cold pressure. How much
pressure should I use?
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Old 5th October 2007, 20:12   #14
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It is very to recommend a pressure when your tyre is hot because you dont know how hot it is. I would recommend that you top up air within 5 - 10 mins of your starting to drive. Also ensure that you do not do any hard driving during those 5 - 10 mins. If you follow this you can safely top up to 33 - 35 psi and once your tyres have cooled down you will be at the ideal pressure.
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Old 9th October 2007, 11:44   #15
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@carboy! Ideally you should not fill air after you have run your car because as Vikram said, you just cannot know how hot the air inside your tires have become.

I am sure, you can find a petrol pump near your home in Pune/Mumbai and fill only air from there. Always fill 33psi. If you intend to do high speeds over long periods (on the express way), you can fill 35/36 psi. But all this is when your tires are cold.

You should perhaps get a good pressure gauge and a portable pump. That is what I am using these days.
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