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  1. #1
    Junior Member
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    What does a star nut do?

    I know it may sound stupid but i've just bought a bike frame to do up and I'm abit new to it all so bare with me.

    On front forks, the fork goes up through the head tube which has a headset fitted and the stem clamps on to the steerer tube. i've heard people on ebay mention that a star nut is fitted. Whats this all about?

    Please could anyone shed any light on it?

    Many Thanks Gaz.

  2. #2
    You Know!? For Kids! jsharr's Avatar
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    On threaded headsets, you use the threading to preload the bearings. On a threadless system you use a starnut and a top cap to preload the bearings before you tighten the stem.

    This link from park explains it better than I ever could
    http://www.parktool.com/repair/readhowto.asp?id=65
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  3. #3
    cab horn
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    Star nut is part of a threadless headset system. If they say the star nut is fitted that means you don't have to do it yourself.

    Example of a starnut: http://www.jensonusa.com/store/produ...-Star+Nut.aspx
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Junior Member
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    Right i'm with you now, It seems obvious now i know. Thanks alot chaps.

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