you would need that special frame with super thin tubes and all the modified parts.
Since the British Lightweight isn't going to be build as a randonneur bicycle, the standard DB 531 frame is light enough to make it into a 50's weight weenie.
@edscoble started
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Since the British Lightweight isn't going to be build as a randonneur bicycle, the standard DB 531 frame is light enough to make it into a 50's weight weenie.