Originally Posted by
Piff
I do wonder about my ability to find parts in the more distant future (i.e. 20-30 years from now).
Why?
The parallelogram derailleur didn't hit its stride until 1951. Most my bikes predate that technology. And while it is not immediate satisfaction, I am patient, there isn't a part I haven't found. I can finf NOS from the 1930s.
Your "worries" are entirely misplaced.