The truth is that most tapers are so roughly made that they don't satisfy ISO or JIS specs. FAG did a report on this. I'll try and find it. You've got to love those Germans.
That would be interesting thanks. Maybe I'll just ask for a replacement, or a campy one that might be better made?
I was under the impression all Shimano cranks were JIS
@Tababa started
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The truth is that most tapers are so roughly made that they don't satisfy ISO or JIS specs. FAG did a report on this. I'll try and find it. You've got to love those Germans.