Bicycles Stack Exchange
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Questions tagged [valves]

Valves allow air to enter pressurized chambers (such as tires and suspension forks) and remain there. Common bicycle valves include Presta, Schrader, and Woods valves.

Valves allow air to enter pressurized chambers (such as tires and suspension forks) and remain there. Common bicycle valves include Presta, Schrader, and Woods valves.

Schrader valves are the same type of valves used on automobile tires. They are common on regular bicycle tires in the USA, as well as suspension forks.

Presta valves are commonly found on road bicycles.

Woods valves were once popular for regular bicycles in the UK but have been superseded by schrader valves. Woods valves are still commonly found in bicycles in East Asia, most notably Japan.

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Are there valve caps that show the tire pressure?

I saw these valve caps for cars, set at 2.4 bar: Is there something similar for bicyles? it would help less careful riders when it's time to pump more air in them.
FarO
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Can I replace an inner tube with a Dunlop valve with one with a Schrader valve?

I've accidentally bought an inner tube with a Schrader valve for a bicycle that's currently fitted with Dunlop valves. Can I still use it or they require holes in the rim of a different size?
Artefacto
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How does a Schrader valve work

So I have a new bicycle which has a Schrader valve on it. So I was wondering how does a Schrader valve actually work , the anatomy of it etc. The best I was able to find was something like this: But I am still not sure about the mechanisms of the…
Kripke Platek
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Is my valve faulty?

I'm not sure how to describe this problem. I'm fixing a puncture on my bike which is a road bike that requires pumping up to about 90psi. So I fix the puncture, and I pump it up. At first it's okay, but within about maybe 5 minutes suddenly the…
Diskdrive
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How to fix this unusual looking valve stem to put air in the tire?

I'm wondering how do I fix this valve stem? I want to put air in the tire. But, i don't see the usual screw-on stem part. The other bicycle tire has such type of stem, so I am thinking this one is broken. How do I repair our replace it? Thanks for…
Matthew Kooshad
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Presta vs schrader valves

Are there any advantages of presta inner tube valves over schrader inner tube valves (or vice versa)? Presta schrader I've always wondered why 2 exist. Apart from their radically different design I don't understand why you'd choose one over the…
user13035
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Can anyone help identify this valve?

Can anyone help identify this type of valve? (see picture below). I've recently bought this bike and am having trouble inflating the front tyre correctly. Any help is greatly appreciated. Cheers
Joel Schiffler
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Valve extender snapped off

Yesterday I crashed, and somehow the front wheel landed on a rock or something that made my valve extender break. The bottom part of it is still stuck in the valve it extended. It's a tubular tire so just changing tube is not an option. Any…
Pantani
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How to use SKS multivalve adapter with dunlop valve?

I have the SKS Rennkompressor with the multi valve head. How do I probably use the head with a dunlop valve? I cannot get the dunlop valve fixed with the multi valve head.
ustroetz
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Why are presta valves better than schrader valves

I have a couple of bikes and tire sizes. Some have presta valves some have schrader valves. I find the the tires that have presta valves hard to pump and that they seem to lose air way more often. Why do newer bikes and most high end bikes use…
mo_maat
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