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Can I ride with a missing piece of Presta Valve?

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Can I ride with a missing piece of Presta Valve?

Old 10-14-17, 02:00 PM
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mr,grumpy 
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Can I ride with a missing piece of Presta Valve?

Hi,

I went to pump up the tires of the Roubaix to take it for a rip and when I was done I took the pump head off and the little piece of the valve that screws in and out is totally MIA.. The tire seems to be holding air just fine.

QUESTION: Can I ride it like this?
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Old 10-14-17, 02:08 PM
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Yes, but not for long. When the tire gets low you will not be able to add air. If you try, the bottom of the valve which is now holding the air in the tube will disappear into the tube and it will no longer hold air. If you don't keep spare tubes on hand, best thing is to go buy a spare right away before that happens.
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Old 10-14-17, 02:13 PM
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Thats the answer that I was expecting. Thanks VT
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Old 10-14-17, 02:13 PM
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Yes, folks have been doing it since the Bronze Age.

The only issue is that many (most?) Valves these days are of low quality so you may run into two ossues next time you pump them.

1- the valve may need to be manually opened (burped), which will now call for a nail os similar to push the stemost. Once burped will pump the same as if undamaged.

2- when you start pumping, you may blow the internal valve assembly out the bottom and into the tube. Older valves were partly closed at the bottom to prevent this, but most aren't anymore. You van prevent losing the valve cure by pumping with the valve at 12:00 so gravity is your friend, but fast pumping can still blow the core through.

Conclusion, ride it until you can't, but buy the replacement now because odds are you'll need it sooner rather than later.
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Old 10-14-17, 03:26 PM
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Many tubes have replaceable valve cores. May not be worth the bother. I keep some at home. My mini-pump has a hose, and I use pricy Shwalbe tubes, because I got stranded twice in one month by broken valve cores, which means I broke two in a row each time.
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Old 10-14-17, 03:30 PM
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the replaceable P/V then can unscrew and let all the air out..
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