Just my 2ct:
I was on the same trip as MarkLG and used an airman with built in pressure gauge. The same cheap chinese internals but mine had problems with the valve connector (leaked) and it's performance went down quickly until the point of "no pressure at all". It left me stuck on a motorway exit near Madrid with a puncture and no inflating device. I investigated the internals and the seals were totally worn. You can still find it behind a concrete pillar of a bridge where a friendly and helpful policeman professionally ditched it ;-)
Not suitable for intensive use if you ask me... Better take a handpump as backup.
T
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Husqvarna 701 Enduro on a round the world trip MotoMorgana
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