Bike Forums - View Single Post - Q: What happens if you screw the plastic cap on a presta valve..

05-12-14, 11:21 AM

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Quote:

Originally Posted by FenderTL5

Question: What happens if you screw the plastic cap on a presta valve without closing the stem completely?
Has anyone done this?

Try it and see. Depending on clearance, it is possible the cap would push down & release air. The manufacturer should make the caps tall enough to prevent it, but who knows ?

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