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  1. #1
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    Need Help with Quill Stem Adapter Diameter

    Sorry for a newbie question. I'm currently in the process of upgrading/updating my bike and I would like to replace the stock stem with threadless quill stem adapter , but I don't know which size should I buy.

    This is my old stem. It's 22.2 in diameter. I think I have a 1'' threaded fork (not sure).
    DSC02948.jpgDSC02949.jpg


    Replacement stem that I have - 28,6/25,4 mm fork diameter.
    new-stem.jpg


    So should I buy the 25,4-28,6 (1'' to 1 1/8'') adapter or the 22.2-28.6 adapter?
    stem-ahead.jpg
    Last edited by rekt; 07-16-14 at 09:18 AM.

  2. #2
    Andrew R Stewart Andrew R Stewart's Avatar
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    It would be nice if the linked pages had better descriptions... Looks like the 22.2-28.6 is the size you need to convert a 1" fork (that has a 22.2 ID) to a stem with a 28.6 ID. Andy.

  3. #3
    Living 'n Dying in ¾-Time JBHoren's Avatar
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    An alternative is this Sunlite pop-top quill stem; there are others, as well.


  4. #4
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    The adapter is giving the true size, which for you is 22.2mm or 7/8" to fit into a 1" fork with a 1/16" wall thickness. The 1" (25.4mm) adapter fits the ID of a 1-1/8" fork with a 1/16" wall.
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  5. #5
    coprolite fietsbob's Avatar
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  6. #6
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    Quote Originally Posted by JBHoren View Post
    An alternative is this Sunlite pop-top quill stem; there are others, as well.

    Handlebar clamp : 25.4, 26.0 or 31.8 ?

    Thanks

  7. #7
    Living 'n Dying in ¾-Time JBHoren's Avatar
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    Quote Originally Posted by patoff View Post
    Handlebar clamp : 25.4, 26.0 or 31.8 ?
    Dunno... just know of it.

  8. #8
    Senior Member
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    Quote Originally Posted by JBHoren View Post
    Quote Originally Posted by patoff View Post
    Handlebar clamp : 25.4, 26.0 or 31.8 ?

    Thanks
    Dunno... just know of it.
    Most of the time, quill stems are 26.0, but I've seen a fair number of 25.4 as well. Haven't seen a vintage-style quill stem that fits 31.8.

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