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Italian or English thread – bottom bracket

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  • March 19, 2013 at 1:04 pm #18262
    tomandrews

    Hi there

    I have a lovely old SAB frame that’s never been used. How do I know what type of bottom bracket to buy? I understand there are Italian v English threads?

    Thnaks
    T

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  • March 19, 2013 at 1:58 pm #723151
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    SpeshRider7287

    Which frame do you have?
    My
    Which frame do you have?

    My mate has a Monopoli that’s B.S.A. so that’d be my guess..

    If you have English (ISO or B.S.A.) thread b/b the outer cup diameter will be 34.6-34.9mm and inner diameter will be 33.6-33.9mm. Shell width will be 68mm or 73mm. It will also have a left hand thread on the drive side.

    If you have Italian thread b/b the outer cup diameter will be 35.6-35.9mm and the inner diameter will be 34.6-34.9mm. She’l width will be 70mm. It will also have right hand thread on both sides.

    Hope this helps.

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