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  1. christonabike_ on

    Yes deflating and repositioning the tube usually resolves valve wonkiness. You just want to make sure it’s lined up and not twisted.

    Sometimes though, you can get it back up just by *gently* giving it a wiggle and pull with some pliers. I must stress *gently*, as it’s easy to ruin the cap thread or rip the tube this way.

    Ordinarily the pressure should be enough to keep it pushed out, so if it doesn’t, that definitely tells you it’s getting snagged on the rim or something.

  2. I would recommend using tubes with presta valves 48mm long, they usually come with little nuts that hold the valve out so you can inflate it the first time without pushing the valve into the rim. Most people keep those finger tight afterwards in case of punctures or just to hold the valve there.

    For that particular case I would inspect the tube itself by removing or partially removing the tire, and tube if necessary to see if it’s installed properly. Valves should be held in place by the air pressure itself, so definitely there’s something wrong.

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