M-gineering wrote:
> Jan Heine wrote:
>
>>
>> By the way, the bolt-circle diameter with the five screws was used by
>> other makers as well. Magistroni made steel cranks with the same
>> pattern. The Gnutti splined cranks and various French cranks all used
>> it as well. I am not sure whether they copied Stronglight (so they
>> could use their aluminum rings), or whether the BCD predates 1933. TA
>> started by making aluminum chainring, to be used with other makers'
>> cranks, so it was natural to use the same standard when they
>> introduced their cranks.
>>
>
> Even Shimano had their version of these cranks!
As did Williams, Zeus (albeit slightly difference BCD), and Sugino.
--
John Thompson (john@os2.dhs.org)
Appleton WI USA