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Old 09-08-2015, 04:46 PM   #1
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TYRE PRESSURES

HI
i have a standard 350 gt with tyres 245/45/18. what are the correct tyre pressures.
cheers
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Old 09-08-2015, 05:25 PM   #2
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Quote:
Originally Posted by pigtrotter View Post
HI
i have a standard 350 gt with tyres 245/45/18. what are the correct tyre pressures.
cheers
Apologies but I don't know the correct pressure but don't check them when its hot weather as air expands & will give you an incorrect reading
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Old 09-08-2015, 08:04 PM   #3
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Should have a sticker in the door shut that tells you the std pressure.
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Old 09-08-2015, 09:22 PM   #4
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On my front tyres it's got a max of 51 psi wrote on it, and there 245/40/18. But I've put nitrogen in mine and I know for a fact that I've only got 35 psi in them and 40 psi in the rears.....
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Old 09-08-2015, 09:36 PM   #5
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The maximum pressure marked on the tyre
is just the max your advised to fill to, and not a guide,
different makes will run best at different pressures, its usually a process of trial and error, or you can just go for the recommended pressure which I think is 34 front
and 36 rear.
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Old 10-08-2015, 02:02 AM   #6
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Any chance you guys can take a snap of your cars? Really want to see how 18s look!
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Old 10-08-2015, 08:10 PM   #7
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WHAT difference does nitrogen make to the pressue. i recently bought tyres and they were filled with nitrogen
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Old 10-08-2015, 08:32 PM   #8
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Old 10-08-2015, 08:44 PM   #9
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From what I've been told nitrogen keeps its pressure better than air, as air tends to warm up quicker, I've only ever had them inflated when I've had new tyres fitted and I've had the car 3yrs now. So must be some truth to it.....
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Old 10-08-2015, 10:21 PM   #10
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Correct. Nitrogen is more stable than normal air so it doesn't expand and hence increase the pressure while driving.
If ever you've checked your tyre pressures after a spirited drive then you'll see that the pressure has raised by a few PSI which is obviously not ideal...Nitrogen doesn't do this

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Old 11-08-2015, 01:47 AM   #11
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Nitrogen does not leak as fast either. Took a long time for my puncture to deflate compared to air filled.
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Old 11-08-2015, 11:43 AM   #12
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WTF..........What % nitrogen do you think 'normal' air is?

78 % so buy that reckoning only 22% can leak out
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Old 26-08-2015, 12:08 AM   #13
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So, is it best to test your tires cold? If so, what if you have been driving on the for a while that day and pull over to put air in your tires? Assuming the standard air pressure is 35psi, should the tires be underinflated, overinflated, or left at 35psi to compensate for the fact they have been driven on recently?
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Old 22-09-2015, 05:15 PM   #14
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Quote:
Originally Posted by gillywig2 View Post
GT tyre pressures are as the sticker says on the door pillar


2.4 bar all round
2.4 bar is 35psi

spare 4.2 bar
4.2 bar is 60psi
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