Do forecourt tyre pumps underread?
I have always monitored tyre pressures of my cars with consideration to safety and economy. Lately however, I am continually baffled with the readings that I record having inflated tyres with a preset electric pump when comparing with a small hand held digital reader and a manual 'pen'.
The two hand held devices always register less than the preset pump (never the same reading either) and are at least 10% under if not more. I have avoided forecourt tyre pressure machines due to their reputation of inaccuracy.
Should I accept the pump has measured correctly or is there a way to obtain an accurate tyre pressure, any thoughts?
The two hand held devices always register less than the preset pump (never the same reading either) and are at least 10% under if not more. I have avoided forecourt tyre pressure machines due to their reputation of inaccuracy.
Should I accept the pump has measured correctly or is there a way to obtain an accurate tyre pressure, any thoughts?
Asked on 10 September 2012 by CallawayDriver
Answered by
Honest John
In my experience, preset pumps are never ever accurate.
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