Originally Posted by
stronglight
My FRENCH threaded Normandy hubs are solid in that area (with no recessed band). I think this may be the most significant indication of BSC threading. (Campagnolo did something similar on their hubs.) - I never thought to look at this before! Here is a quick photo of one of my French thread hubs:
[CENTER]French threaded hub with a single solid band between flange and threads
Bob, you beat me too it!!
My 1982 French Maillard hub is smooth in that area as well.
As far as measuring the pitch.....I dont think you'll have much luck:
French threads 34.7 X 1
B.S.A threads 34.8 X 1.058
B.S.A. freewheels are .1mm larger in
diameter with a different pitch. Pitch
differences are the limiting factor