Sheldon Brown wrote:
> Back in the day, hangers were not standardised from one brand to
> another...there were Campagnolo, Cyclo, Hurét, Simplex and probably
> other hangers, not generally compatible without a lot of fiddling.
> Eventually, the Campagnolo style became the de-facto standard we use today.
And this persisted until well into the 80s...
Now we've standardized derailleur hangers but have a variety of brake mountings, stem/headset dimensions, etc.
-John Thompson (firstname.lastname@example.org)
Appleton WI USA