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Schrader
From WikiPedalia
Standard automotive-style air valve. The other, skinny kind is called "Presta".
There is a third type of valve, very rarely seen in the U.S., which has a bottom similar to a Schrader and necks down to about the size of a Presta. This is a Woods valve, formerly popular in the British Isles and Asia.
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|
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|---|---|---|
| Schrader valve | Presta valve | Woods valve |
If you want to convert a rim drilled for Presta valves to accept Schrader valves, drill it out with a 21/64" drill bit.
The external threaded part of a Schrader valve is 7.7 mm (.302") x 32 T.P.I.
