Originally Posted by
old and new
those dimensions are more common than not especially in the early '80s and before, typical Italian geometry. By the very late '80 actually even later, tope tubes were more or less equal the the STs, depending on brand. Most older ones had short TTs.
I flipped his st/tt measurements, my mistake (coffee please). Disregard my "custom" designation but I stand by a 70's not 80's bike.
thirst