Having some issues with threads.
I understand from (Barnett Manual) that threads used on bicycles can be one of these standards:
- ISO ((International Standards Organization)
- BSC (British Standard Cycle)
- Italian Whitworth
But I'm really confused on what this means..... are some of these like Italian Whitworth only for a brief period
of time in a faraway place and not of consequence - or do these actually show up occasionally?
Are all new machines built only with, maybe, ISO or BSC or Metric?
and if ISO is Metric (exclusively?) then ISO and Metric must(???) somewhat (or entirely?) overlap. Or is there
something else to know about.
None of this is entirely clear from reading.....
Also, there are Fine and Course threads - are Course threads every found on bicycles?
also of course there are many major diameters but I can't think where really big or really small ones might be used
on a bicycle. Is there a chance somebody might be able to give me a practical range of what major diameters a
shop should stock?
Finally to Know something is compatible from specs I'm thinking we'd have to know all these things:
- Major Diameter
are there maybe other things to know before we can be sure that the two parts are going to be mate perfectly?