Originally Posted by iab

I did this a while back. My 3 main rides. All Italian. Top is 1933, middle is 1959, bottom is 2009. This picture shows the similar trail, over 75 years.


Geometry2 by iabisdb, on Flickr



This compares the geometries, and show the seat/bars relationship is essentially the same, within millimeters, but the BB & wheelbase is all over the place.


Geo_2 by iabisdb, on Flickr



I do have a "new" Italian bike from the mid 20s. I should do a drawing of it to compare.