If I can anticipate the thread from a while back returning to frame geometry and fork rake, front centers and head angles, this interesting chart was posted on the framebuilders list last week,
for those who didn't catch it.
Grant McLean Toronto.Ca cheering because I now understand trail!
O \O/ _< \_ _< _ (_)>(_) (_)>(_)
The geometry for one Alex Singer randonneur bike (700C, 1962) can be
found at the Vintage Bicycle Quarterly web site at
Jan Heine, Seattle,