• Is there something I can measure on an old pair of cranks to work out whether they're JIS or ISO?

    They're an obscure White Industries by Sugino triple crankset that I can't find much information about on Sheldon, velobase, etc.

  • ISO or JIS

    As long as you make sure the taper isn't too long or short, it doesn't matter:

    ISO BB is about ~2mm shorter than stated with a JIS crank

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