Not sure what size it is. i measured with calipers and i got something around 26.5-26.6mm, just read in the archives that a '77 took a 26.4mm post with tange #2 tubes. same as this frame i have...
does anyone have a 26.4mm post they could part with? two bolt campagnolo would be preferred but not necessary.
Thanks, Jeff Piwonka Austin, Texas USA (until we secede....You like that mike spess? ha.)