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Old 18th October 2016, 08:55   #1
Daveluck
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Default Tyre pressure and temperature

Hi,

When should I check my tyres pressure?

Does the temperature make any difference? For instance if I think my tyres look a little flat, head off to the garage about 5km away to check them, would l get a false reading because they have warmed up?
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Old 18th October 2016, 09:04   #2
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Buy a digital tester for a tenner and check yourself.

I doubt you find a big difference
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Old 18th October 2016, 10:05   #3
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Yes, rising ambient temperatures and especially the sun's radiant heat does effect tyre pressure. I've checked my tyre pressure in the cool summer mornings, and again in the HOT afternoon, I've had upto 5psi difference.

Tyre pressures are given as cold inflation readings, so its best to check tyre pressure before you drive too far, not to warm the air in the tyres (air is a gas, gas expands once warmed up).

As FrenchMike suggested, get yourself a digital tyre gauge, £3 to £6 on ebay.
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Old 18th October 2016, 11:27   #4
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Always told buy my dad many moons ago when I first started driving.

Check tyres, oil and coolant weekly. (old cars back then, weekly essential )

And always with cold tyres and cold engine. Still do it to this day. Dad's always know best
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Old 18th October 2016, 11:42   #5
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Old 18th October 2016, 12:11   #6
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Thank you chaps.

Ambient! That was the word I was looking for.

Got a cheapy digital meter and an even cheaper mini compressor.


For some reason my tyres always look under inflated but when I check the pressure is pretty good.

Parker - you made me chuckle ( fondly )... you obviously never met my old man Lol! Flawed but always did what he thought was right / best!
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Old 18th October 2016, 12:16   #7
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Quote:
Originally Posted by Daveluck View Post
Thank you chaps.

Ambient! That was the word I was looking for.

Got a cheapy digital meter and an even cheaper mini compressor.


For some reason my tyres always look under inflated but when I check the pressure is pretty good.

Parker - you made me chuckle ( fondly )... you obviously never met my old man Lol! Flawed but always did what he thought was right / best!
When I had my tyres fitted the fitter advised me to keep them at 35psi all round, saying the 32/30 for the diesel was too soft.
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Old 18th October 2016, 12:27   #8
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Old 18th October 2016, 16:00   #9
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Quote:
Originally Posted by KeithA View Post
When I had my tyres fitted the fitter advised me to keep them at 35psi all round, saying the 32/30 for the diesel was too soft.
I keep mine at 35psi all round, I'm currently running with 225/40/18 tyres though so due to the thin sidewalls they always look flat...even though I had my alloys refurbished they seem to slowly lose air so keeping them topped up to 35psi always ensures they have a decent pressure.
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Old 18th October 2016, 16:25   #10
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What should the pressure be in a zt saloon 2.5? I recently put 36psi in front and 35psi rear! It is running 18" alloys. I was told its way to high and should be 32.. wondered why my car was rattling!
I used a tyre pressure finder online and that said 35 front 34 rear.
What do all you put in?
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