Originally Posted by
shelbyfv
Thanks. I'm about to replace the 50 on a 50-34 with a 46. I think I'll just leave the FD where it is to start with, rather than lowering it for the 46.
Why? I think it would shift better with the derailleur at the specified 1mm above the large ring. I think that going from a 50 to a 46 will open that clearance by quite a bit (about 8mm by my calculations).