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  • Tyre valve thread sized
  • nickjb
    Free Member

    Anyone know the thread sized of a schrader and presta valve? A quick google and a look on Sheldon Brown didn’t throw up the answers

    Posted 10 years ago
    MidlandTrailquestsGraham
    Free Member

    How quick a Google ? 😉

    http://en.wikipedia.org/wiki/Schrader_valve

    External thread
    Metric: 7.7 mm OD, thread root diameter is 6.9 mm × 0.794 mm pitch.
    Imperial: 0.305 in OD, thread root diameter 0.271 in × 32 tpi (threads per inch)
    Internal thread (to accept the threaded valve core)
    Metric: 5.30 mm OD × 0.706 mm pitch
    Imperial: 0.209 in OD × 36 tpi.

    Posted 10 years ago
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