K keithglos Senior Retro Guru Jul 19, 2013 #31 My memory is going, I can't remember whether it was Cyclo or Constrictor who had an eliptical chainring in their catalogue, late 1930's, standard 5 pin fitting.
My memory is going, I can't remember whether it was Cyclo or Constrictor who had an eliptical chainring in their catalogue, late 1930's, standard 5 pin fitting.
