Track Cycling - Cog Threading: NJS=ISO?

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mynameisryan

03-25-09, 06:25 PM

Just wondering, is the threading on, for example, a Dura-Ace NJS cog going to be the same as an EAI cog (which is marked ISO)? Or does NJS=JIS? What's the deal? What are these standards, how do they compare?

bitingduck

03-26-09, 01:11 PM

found this ancient thread about cog threads:
http://www.bikeforums.net/archive/index.php/t-159960.html