About the Blackburn Trackpump 1.

I’ve used mine earlier today, it’s worked without fuss for a couple of years now.
One thing I’ve noticed, with the “magic” auto-sensing valve connector, is it sometimes needs a little help in switching between Presta and Schrader valves. It senses the back-pressure. So if you’ve previously used it with a Schrader valve, and then you want to change a Presta-valved inner-tube, you have to connect the pump first to an inflated Presta-valved inner tube.
If you don’t, when you connect the pump to your (flat) Presta-valved inner tube, it won’t work. It needs that back-pressure to switch.
Hope this helps someone.

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