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Old 08-19-07, 09:17 AM   #1
Gaz A
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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.
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Old 08-19-07, 09:23 AM   #2
jsharr
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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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Old 08-19-07, 09:25 AM   #3
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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
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Old 08-19-07, 10:14 AM   #4
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Right i'm with you now, It seems obvious now i know. Thanks alot chaps.
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