At 06:36 AM 8/26/06 -0700, Fred Rafael Rednor wrote:
> I don't know the answer, but it isn't limited to Bottom
>Bracket threading. Italian headsets are 25.4mm with 24 TPI
>(well that one makes sense, as 25.4mm = 1 inch); and the axles
>are threaded at 26 TPI, although the diameters are typically
>9mm and 10 mm.
It looks like they started making components on lathes with English gears and lead screws and continued to do so.
John Betmanis <johnb@oxford.net>
Woodstock, ON Canada