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Simply by removing the valve, how long does it take to deflate a tube for a 26" bike tire? Also, is there a safe and quicker alternative to do it? Thank you.

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  • 2
    Daniel raises a good point - this feels like an XY problem. What are you trying to achieve?
    – Criggie
    Dec 13 '20 at 21:27
  • 2
    Getting a puncture can do it exceptionally quickly. Dec 14 '20 at 1:09
  • 1
    Do you care whether the tube is still usable after it's been deflated? That affects the answer.
    – shoover
    Dec 14 '20 at 3:30
  • Like 5-10 seconds maybe. Is there a reason you are unable to test this out?
    – MonkeyZeus
    Dec 14 '20 at 14:34
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I wouldn't bother removing the valve core - assuming its a schrader/AV/car valve, press something pointy into it for ~20 seconds and most of the air will come out.

If you want to roll the tube up, it is convenient to have a deflater tool, essentially a valve cap with a pin that presses the valve's stem and lets the air out. Convenient but not necessary.

If you have a presta valve then pressing the stem with your finger works fine too.

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    Deflator tools are easy to make from a plastic valve cap with a drill and a blunt self-tapping screw: cross-drill vent holes and run the screw into another hole in the top. They're handy even on Presta if you want both hands to roll a tube without a clean flat surface (might not even need the screw for Presta depending on your cap.
    – Chris H
    Dec 13 '20 at 21:31
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Why do you want to deflate it? Is the tire mounted on the rim and you want to remove it, or is the tube out and you want to get all the air out so you can fold/roll it up?

If you're removing a tire from the rim (or removing a tube from inside the mounted tire) you do not need to get all the air out. Press the valve pin and squeeze the tire several times to push the air out. This will take may be 60 seconds.

If the tube is out and you want to roll it up, press the valve pin (or remove the core, lay the tube out on a flat surface with the valve at one end, and start rolling from the other end. Will take 2-3 minutes.

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If removing the valve, the air should be released within a few seconds.

If you have a schrader valve, in the center of the opening there's a pin that you press in to release air. It shouldn't take more than a few seconds to release all the air. If the tube is still on the rim, I usually sandwich the wheel between myself and a wall to squeeze a little more out once the air stops coming out on it's own.

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