sure the pump head isnt shit?
The tube on the adapter is a smaller diameter than a normal tyre valve, so the pump head doesn't stay on. Just slips off once the pressure goes up. I'm currently resorting to using a cable tie to hold it on, then cut it off afterwards. Not ideal.
Could you shim the tube of the adapter out a bit with a few layers of electrical tape?
wierd, I have had 5 or 6 of these little "crackpipe" adapters over the years and never had that happen before
@Jonny69 started
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sure the pump head isnt shit?