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Old 08.11.2010, 18:33
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Tyre Pressure

A friend has a polo and the website I looked at says the tyre pressure should 30. (It is a UK site). But he thinks that the machines here measure differently as his reading is 2.2.

I have no idea how to convert or even if the measurement is the same and he just has really flat tyres !

Does anyone know what the swiss equivalent of a UK 30psi for tyre pressure is ?

Last edited by Spottydog; 08.11.2010 at 19:09.
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  #2  
Old 08.11.2010, 18:35
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Re: Tyre Pressure

30 psi is 30 psi in the UK and in Switzerland.

2.2 bar is 2.2 bar in the UK and Switzerland.

Conversion thingymajig here.
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Old 08.11.2010, 18:38
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Re: Tyre Pressure

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A friend has a polo and the website I looked at says the tyre pressure should 30. (It is a UK site). But he thinks that the machines here measure differently as his reading is 2.2.

I have no idea how to convert or even if the measurement is the same and he just has really flat tyres !

Does anyone know what the swiss equivalent of a UK 30 for tyre pressure is ?
In the UK they use PSI (pounds per square inch) and I believe the other rating is bar.

Conversion here;

http://www.classicmotorcycles.org.uk...e_pressure.htm
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Old 08.11.2010, 18:40
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Re: Tyre Pressure

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A friend has a polo and the website I looked at says the tyre pressure should 30. (It is a UK site). But he thinks that the machines here measure differently as his reading is 2.2.

I have no idea how to convert or even if the measurement is the same and he just has really flat tyres !

Does anyone know what the swiss equivalent of a UK 30 for tyre pressure is ?
If you have changed from the original tyres to a new brand, check the pressure for the tyre and not the car...
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Old 08.11.2010, 18:40
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Re: Tyre Pressure

Thanks.

Ok I confess I had no idea what I what supposed to be converting to as the website I went to had way too options ...
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Old 08.11.2010, 18:42
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Re: Tyre Pressure

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If you have changed from the original tyres to a new brand, check the pressure for the tyre and not the car...

It is a newly aquired car so I guess the tyres aren't new.

Last edited by Spottydog; 08.11.2010 at 19:08.
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Old 08.11.2010, 18:43
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Re: Tyre Pressure

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In the UK they use PSI (pounds per square inch) ...
No we don't. We use bar. At least, those of us in the current century do because all our cars come from abroad .
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Old 08.11.2010, 19:01
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Re: Tyre Pressure

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Thanks.

Ok I confess I had no idea what I what supposed to be converting to as the website I went to had way too options ...
I think your mate was referring to 2.2 bar, this is equal to 32 PSI.

If you look at the table linked on my previous post, the first 2 columns is all you need to worry about.

On another point, I remember the Tyre pressures on a sticker as you open the Driver's door. They should have 3 readings, Unladen, Half Laden and Laden.

As Swissbob pointed out, mostly the "Bar" measure is used.

and... 30 PSI = 2.07 bar

Last edited by BuggedSee; 08.11.2010 at 19:02. Reason: adding info
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  #9  
Old 08.11.2010, 19:06
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Re: Tyre Pressure

The recommended tyre pressures in bar and psi for various load situtaions should be on the inside of the Polo fuel flap...
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Old 08.11.2010, 20:26
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Re: Tyre Pressure

Use only the table inside the door, fuel flap or the car's handbook. The the pressure rating stamped on the tire is only the max pressure, will be hard as a rock and should never be used.

Too little pressure is much worse than too much, as too little pressure will result in dangerous handling, poor braking and will destroy the tire gradually.
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Old 08.11.2010, 20:29
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Re: Tyre Pressure

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Use only the table inside the door, fuel flap or the car's handbook. The the pressure rating stamped on the tire is only the max pressure, will be hard as a rock and should never be used.

Too little pressure is much worse than too much, as too little pressure will result in dangerous handling, poor braking and will destroy the tire gradually.
Again, manufacturers guidelines on the fuel flap are for the original tyre brand and model. If the seller has fitted v-rated , run flat or any other tyre make/model/type, then the tyres manufacturers guides should be applied.
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Old 30.11.2010, 17:13
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Re: Tyre Pressure

I was thinking about this when I was checking the pressure of my Winter tyres. I have just been putting the amount of air in them that it says on the car so for the original tyres. How do I find out how much I should be putting in? I checked on the wheel itself but I did not see any marking for bar or psi; is the info normally on the tyre itself but not so obvious?

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Again, manufacturers guidelines on the fuel flap are for the original tyre brand and model. If the seller has fitted v-rated , run flat or any other tyre make/model/type, then the tyres manufacturers guides should be applied.
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Old 30.11.2010, 17:31
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Re: Tyre Pressure

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I was thinking about this when I was checking the pressure of my Winter tyres. I have just been putting the amount of air in them that it says on the car so for the original tyres. How do I find out how much I should be putting in? I checked on the wheel itself but I did not see any marking for bar or psi; is the info normally on the tyre itself but not so obvious?
The PSI should be marked on the tyre, usually near the size and rating, but this may be on the inner wall and not easily visible, if not,the mnfrs web site may help.
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Old 30.11.2010, 17:34
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Re: Tyre Pressure

Cheers, I will try to get some decent light on the tyre to read it properly.

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The PSI should be marked on the tyre, usually near the size and rating, but this may be on the inner wall and not easily visible, if not,the mnfrs web site may help.
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Old 30.11.2010, 17:34
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Re: Tyre Pressure

tyre pressures should also be checked / adjusted when the wheels and tyres are cold too.
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Old 30.11.2010, 17:36
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Re: Tyre Pressure

Yep I always drive to the nearest garage when checking the pressure.

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tyre pressures should also be checked / adjusted when the wheels and tyres are cold too.
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Old 30.11.2010, 17:40
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Re: Tyre Pressure

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The PSI should be marked on the tyre, usually near the size and rating, but this may be on the inner wall and not easily visible, if not,the mnfrs web site may help.
Tyre pressures are set by the manufacturer of the car, and take into account the weight, the suspension and other characteristics of the car. As far as the markings on the tyre are concerned, you need to ensure that they encompass the range set by the manufacturers.

Everywhere you look will tell you the same thing: tyre pressures are defined by the car manufacturer. The only exception to this will be specialist tyres - not the ones used by the vast majority of motorists.

Do not inflate your tyres to the max - you might get better response on your steering, but they'll be more prone to damage, and will wear considerably more quickly.
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Old 30.11.2010, 17:46
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Re: Tyre Pressure

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tyre pressures should also be checked / adjusted when the wheels and tyres are cold too.
It is struggling to get above zero outside - you think it is going to make much difference at the moment???

We're not 10 laps into a test session at Mallory - where Gerrards can massively change the left to right pressures.
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Old 30.11.2010, 17:49
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Re: Tyre Pressure

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It is struggling to get above zero outside - you think it is going to make much difference at the moment???

We're not 10 laps into a test session at Mallory - where Gerrards can massively change the left to right pressures.

if hes been running his tyres at 2.2 psi they'd probably be quite hot
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Old 30.11.2010, 17:49
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Re: Tyre Pressure

Feck, now you have just confused me. If my car manufacturer tells me my pressure should be 2.3 bar & the markings on the tyre say something different how do I figure it out?

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Tyre pressures are set by the manufacturer of the car, and take into account the weight, the suspension and other characteristics of the car. As far as the markings on the tyre are concerned, you need to ensure that they encompass the range set by the manufacturers.

Everywhere you look will tell you the same thing: tyre pressures are defined by the car manufacturer. The only exception to this will be specialist tyres - not the ones used by the vast majority of motorists.

Do not inflate your tyres to the max - you might get better response on your steering, but they'll be more prone to damage, and will wear considerably more quickly.
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