Tyre Valve Extensions
Discussion
So how do they work and allow you to measure the tyre pressure when inflating?
I have seen some pics that show a nipple at the tyre end that opens the tyre valve, and a separate valve at the open end. To me it looked like the inflater opens the outer valve, and the inner one (on the original valve stem) is held open.
Or are there different types of these things?
I have seen some pics that show a nipple at the tyre end that opens the tyre valve, and a separate valve at the open end. To me it looked like the inflater opens the outer valve, and the inner one (on the original valve stem) is held open.
Or are there different types of these things?
Edited by adam quantrill on Wednesday 13th February 22:57
In fairness the ones I have seen before were straight & could be different, but they were just a pipe with a pin down the middle that pushed in the tyre valve when you pushed in the extension pin.
Think about your actual question for a minute.
If the outer is a valve the only way to check the pressure is to pump it up, and you wouldn't be able to reduce the pressure in the tyre with the extension in place if it were a valve on the outer unless you removed the valve on the wheel itself.
So maybe the full answer to the question depends on whether they are like this & if you then remove the inner valve & just use the extension valve in that case.
If that makes sense!
Think about your actual question for a minute.
If the outer is a valve the only way to check the pressure is to pump it up, and you wouldn't be able to reduce the pressure in the tyre with the extension in place if it were a valve on the outer unless you removed the valve on the wheel itself.
So maybe the full answer to the question depends on whether they are like this & if you then remove the inner valve & just use the extension valve in that case.
If that makes sense!
Yes my question was posited with the benefit of forethought, to provoke your response!
There must be two types, the straight type more likely to have the pushrod.
With the bent type (or extra valve type) the inner valve is not removed, but held open permanently when the device is screwed on.
There must be two types, the straight type more likely to have the pushrod.
With the bent type (or extra valve type) the inner valve is not removed, but held open permanently when the device is screwed on.
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