Thread: 27-Speed Brompton
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Old 01-20-19, 12:19 PM
  #5  
fietsbob
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I did a 3 by 3 by 3 speed on a JC Higgins in the 1950s , Then, it was a snap ring triple cog cluster machined out of 1 piece of steel.. on an AW3..

Triple crank, cottered type.. Huret Alvit D's 3 shift levers on the down tube..
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