Lezyne : http://www.wiggle.co.uk/lezyne-road-drive-mini-abs-pump/ best mini pump I have ever owned. Only pump I have of comparable quality is my shock pump.
But if you have removable valve cores you need to tighten them with pliers before you use the pump for the first time
Or if you get really sick of it, threadlock them in
TBH I only get it is the valve is new, once I have tightened it it has never worked loose. touch wood!
@branwen started
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Lezyne : http://www.wiggle.co.uk/lezyne-road-drive-mini-abs-pump/ best mini pump I have ever owned. Only pump I have of comparable quality is my shock pump.
But if you have removable valve cores you need to tighten them with pliers before you use the pump for the first time