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Identify Markings on Fork Steerer

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Identify Markings on Fork Steerer

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Old 12-06-18, 05:57 PM
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abshipp 
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Identify Markings on Fork Steerer

I just bought this fork off of eBay and noticed these markings on the steer tube.

Any ideas as to what the top symbol is?

This was listed as a fork from a 1978-1982 Trek.

Thanks!
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Old 12-06-18, 07:00 PM
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Metacortex
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The top symbol (logo) indicates the fork was made by Ishiwata. If the other stamp is 0B then I believe that indicates a Feb. 1980 mfg. date.

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Old 12-06-18, 07:06 PM
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Old 12-06-18, 07:16 PM
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abshipp 
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Originally Posted by Metacortex View Post
The top symbol (logo) indicates the fork was made by Ishiwata. If the other stamp is 0B then I believe that indicates a Feb. 1980 mfg. date.
Perfect! I figured that this was an Ishiwata fork since it was listed as having 58mm offset (I assumed 55mm), but I couldn't find that maker's mark from any Google searches.

Thanks!

Originally Posted by mgopack42 View Post
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Old 12-07-18, 06:54 AM
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It's easier to remember the trade mark once you realize that the symbol is a stylized cross-section of a double butted tube, bent into a circle (which is symbolic of bicycle wheels). This isn't apparent from the steerer tube stamp but depicts better on the catalogue sheet. However, it's easiest to see on earlier versions of the trade mark, where the butts are more exaggerated.

Last edited by T-Mar; 12-07-18 at 06:59 AM.
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