• It's basically just a way of connecting the big fat headtube (outside diameter about 47mm) with the relatively slim seat tube (diameter of 28.6mm) without having an overly chunky top tube. It's made doing the internal brake cable a right PITA though.

  • It's basically just a way of connecting the big fat headtube (outside diameter about 47mm) with the relatively slim seat tube (diameter of 28.6mm) without having an overly chunky top tube. It's made doing the internal brake cable a right PITA though.

    That's exactly why Talbot use that top tube on the majority of frames, in that orientation.

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