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One trick I have used in a pinch when my stem was too short for the rim depth (as your picture is showing) is to place my thumb against the tire at the point of the stem and carefully press in until the stem is being held out of the rim. This can give the leverage needed to attach the pump head to the short stem length. While the stem extender solution is a ...


You assume the whole leak is the valve. Rubber is not air tight. Most of the leak is through the rubber. Clearly can create a near airtight valve. And with enough rubber a near air tight tube. But it would be heavy. Just pump your tires once a week. I see the link said pump daily. OK, at least once a week. On my road bike I pump before every ride.

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