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  1. #1
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    simple question about bicycle headsets,

    Hey everyone,

    .. like the title says, just a simple question:

    Whats the most common size for bicycle headsets?

    (in diameter, like 1 1/8 inch)

    .. and for that most used size, what are the corresponding headtube and steer tube diamters?

    Thanks for all replies!

    cheers,

    Fabian

    P.S. I hope is post is understandable, my mother language is german

  2. #2
    GONE~
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    It's hard to say but for most modern road bikes with threadless headsets, they will generally be 1 1/8". With older steel bikes with threaded headsets and quill stems, it would generally be 1".

  3. #3
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    Quote Originally Posted by BlackPowder View Post

    Whats the most common size for bicycle headsets?

    (in diameter, like 1 1/8 inch)

    .. and for that most used size, what are the corresponding headtube and steer tube diamters?
    Here's a link to Sheldown Brown's headset cribsheet which I think should answer your questions.

    While you're at the SB site, you should bookmark it as a reference source for the future.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  4. #4
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    It's hard to say but for most modern road bikes with threadless headsets, they will generally be 1 1/8"
    .. and for 1 1/8'' headsets, the steer tube would have an outside diameter of 28,6 mm; headtube inner diameter 33,9 mm?

  5. #5
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    Quote Originally Posted by BlackPowder View Post
    .. and for 1 1/8'' headsets, the steer tube would have an outside diameter of 28,6 mm; headtube inner diameter 33,9 mm?
    Yes, but the steerer tube diameter at the base where the crown race fits will be 30mm. The crib sheet I linked you to gives you the data you need, subject to rounding errors when converting imperial to metric dimensions.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

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