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Tech. Advice: Vincent/NSU Fox/Quickly Bikes
Metric/Imperial Threads
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<blockquote data-quote="Magnetoman" data-source="post: 140398" data-attributes="member: 2806"><p>That's true now, but it isn't true for bikes made before the mid-1960s. Prior to unifying under the ISO banner, each country had its own version of metric, including the Japanese JIS. Although in most cases the diameters, pitches, and A/F head sizes were the same, there were some notable differences to catch the unwary. Also add to the list the German Löwenherz, which are metric fasteners but with 53° 8′ pitch angle and commonly used in places where the British used BA. Bosch magnetos through at least the 1920s used Löwenherz fasteners.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 140398, member: 2806"] That's true now, but it isn't true for bikes made before the mid-1960s. Prior to unifying under the ISO banner, each country had its own version of metric, including the Japanese JIS. Although in most cases the diameters, pitches, and A/F head sizes were the same, there were some notable differences to catch the unwary. Also add to the list the German Löwenherz, which are metric fasteners but with 53° 8′ pitch angle and commonly used in places where the British used BA. Bosch magnetos through at least the 1920s used Löwenherz fasteners. [/QUOTE]
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Tech. Advice: Vincent/NSU Fox/Quickly Bikes
Metric/Imperial Threads
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