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Old 10-15-11, 04:34 PM   #1
BlackPowder
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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
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Old 10-15-11, 04:41 PM   #2
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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".
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Old 10-15-11, 10:33 PM   #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.
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Old 10-16-11, 03:38 PM   #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?
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Old 10-16-11, 03:53 PM   #5
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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.
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