Originally Posted by
smd4
Does that second, incorrect protrusion/stop on the RD do anything except confuse people?
I didn't notice or have second thoughts when I had to replace my DA 9100 with an Ultegra R8000 after a minivan rear-ended me. It just fit and looked right. Different hanger? Now I need to dig up my R8000 to see if my version had it (replaced it with Sensah Empire Pro and set aside the bike for trainer duty).