Roman,
In the days when top tubes were all about 1 inch in
diameter, it was easy to convert between center-to-center and
center-to-top specifications. So it was not an issue, as long
as you knew what method was used by a particular builder. Once
you're in a situation in which different top tube diameters
might be used for various bicycles, the c-to-c dimension really
looses its meaning.
So my impression is that c-to-c was more common in the past -
but in any event, local custom dictated which method to use.
Best regards,
Fred Rednor - Arlignton, Virginia (USA)
>
> Here's a question that relates to framebuilding and history
> of the craft so
> I will beg forgiveness to cross-post to Framebuilders and CR
> list.
>
> Does anyone have any insight about using c-c vs c-t
> dimensions for seat
> tubes lengths when describing a frame size. It seems that
> most Italian
> builders used c-t dimensions. Was there a reason for this vs
> c-c dimensions?
> Did it have to do with the build process itself in some way?
> Did these
> methods of measure change over time for any reason. Are there
> any build
> traditions where the top tube is not measured c-c as is the
> norm now?
>
> Roman Stankus
> Atlanta, Georgia
> USA
>
>
> _______________________________________________
>
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