Don Walter wrote:
>
> It seems that 27.2mm is a very popular seatpost size on classic
> lightweight framesets. What brands and type of tubing does this size
> correspond to, and what is the usual outside diameter of the seat tube?
> Trying to sort out most common seatpost sizes with quality frame tubes of
> the era.
Don, most of the work has already been done:
http://www.sheldonbrown.com/
Chuck Schmidt
SoPas, SoCal