Matthew Bowne wrote "Anybody know when Cinelli stopped production of the 1A stem? What replaced it as "THE stem"? "
The current Cinelli website (www.Cinelli.it) still lists the 1a stem in its list of current products, it's still in production. Not sure about anyone else but the 1r was popular in my neck of the woods until some of the more modern (Cinelli oyster and Frog) stems became available.
Marty Eison
Frisco, Texas. USA