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 Post subject: Tyre pressure gauges
PostPosted: Fri Apr 21, 2017 3:08 pm 
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Been reading some sites about checking tyre pressures and to make sure your pressure gauge is calibrated correctly as they can become less accurate over time.

I have a digital pressure gauge and I know this isn't anymore accurate then an analogue one but do you think it's possible that it could become less accurate over time?

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 Post subject: Re: Tyre pressure gauges
PostPosted: Fri Apr 21, 2017 3:17 pm 
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Drives: peugeot 107
i have 3 one digital x2 analogue the digi one is a cheap chuck away when it fails but to my surprise in 3 years still reads the same as my more expensive x2 analogue say the same its around 2psi out
Ron


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 Post subject: Re: Tyre pressure gauges
PostPosted: Fri Apr 21, 2017 3:32 pm 
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When I got my car back from a service the right rear was inflated to 36.5 PSI according to my digital pressure gauge when it's supposed to be 36 PSI, which is what it was set at the last time I checked no more than two weeks before.

I presume they had checked them and set it to 36 PSI or thereabouts hence my quite accurate reading of 36.5. The fronts however were up around 36 PSI when they are supposed to be 29 PSI so I had to let a lot of air out in both front tyres.

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2007 Smart Fortwo Passion Coupe C451 Turbo 999cc 84bhp
Electric Windows
Air Conditioning
Smart Radio 9
Panoramic Sunroof
Luggage Compartment Cover
Softouch Automatic Gear Programme
Bodypanels & Tridion Cell in Silver Metallic
15" Alloy Wheels


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 Post subject: Re: Tyre pressure gauges
PostPosted: Sun Apr 23, 2017 9:30 am 
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Drives: Aygo Black & STI
I've tried loads over the years and the best one to date is similar to this - http://www.demon-tweeks.co.uk/Product.d ... 0wodfbAOOA

Bit expensive but its calibrated and accurate.


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 Post subject: Re: Tyre pressure gauges
PostPosted: Sun Apr 23, 2017 9:37 am 
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Scooby Towers wrote:
Bit expensive but its calibrated and accurate.


I've got this one...

Amazon reviews

https://www.amazon.co.uk/product-reviews/B00499DTS8/ref=cm_cr_dp_srch?filterByKeyword=accurate&search-alias=community-reviews

Auto Express review

http://www.autoexpress.co.uk/accessories-tyres/45076/ring-digital-tyre-keyring-gauge-rtg4

Cheap but accurate according to the Amazon reviews and also Auto Express. It is fiddly but works for me.

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2007 Smart Fortwo Passion Coupe C451 Turbo 999cc 84bhp
Electric Windows
Air Conditioning
Smart Radio 9
Panoramic Sunroof
Luggage Compartment Cover
Softouch Automatic Gear Programme
Bodypanels & Tridion Cell in Silver Metallic
15" Alloy Wheels


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 Post subject: Re: Tyre pressure gauges
PostPosted: Fri May 12, 2017 6:07 pm 
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Most instruments will drift over time. When I worked in an instrumentation lab all equipment had to be recalibrated every six months. If a piece of kit wasn't 'in-date', you weren't allowed to fit it in a vehicle.

That said, tyre pressure gauges are not precision instruments anyway. Accuracy is an illusion.


Sent from my iPad using Tapatalk


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 Post subject: Re: Tyre pressure gauges
PostPosted: Fri May 12, 2017 11:33 pm 
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Gooders_uk wrote:
That said, tyre pressure gauges are not precision instruments anyway. Accuracy is an illusion.

And that's why I've been saying (in other threads) that concerning yourself about an apparent 0.5 psi change is pointless.


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 Post subject: Re: Tyre pressure gauges
PostPosted: Sat May 13, 2017 12:18 am 
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Enjay wrote:
Gooders_uk wrote:
That said, tyre pressure gauges are not precision instruments anyway. Accuracy is an illusion.

And that's why I've been saying (in other threads) that concerning yourself about an apparent 0.5 psi change is pointless.


I hear that. My company car is an Audi and the TPWS is shockingly unreliable, as is the adblue system, but that's a whole other story.


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 Post subject: Re: Tyre pressure gauges
PostPosted: Sat May 13, 2017 8:17 am 
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Enjay wrote:
And that's why I've been saying (in other threads) that concerning yourself about an apparent 0.5 psi change is pointless.


Checking them regularly cannot do any harm though can it, even if virtually pointless.

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2007 Smart Fortwo Passion Coupe C451 Turbo 999cc 84bhp
Electric Windows
Air Conditioning
Smart Radio 9
Panoramic Sunroof
Luggage Compartment Cover
Softouch Automatic Gear Programme
Bodypanels & Tridion Cell in Silver Metallic
15" Alloy Wheels


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 Post subject: Re: Tyre pressure gauges
PostPosted: Sat May 13, 2017 10:17 am 
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nlel wrote:
Checking them regularly cannot do any harm though can it, even if virtually pointless.

I would say that checking them regularly is essential - with regular monitoring you would pick up a notice a slow leak that would be impossible to see from a visual inspection. The pointless bit is fretting over 0.5 psi.


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