>>1561281It depends what RD it is. Precisely - what I said pertains solely to modern shadow type RDs and similar designs. For those it is trivially reproducible. Frankly - it was a costly finding for me back in 2009-ish. I bought two 660 series SLX RDs and tried to use them 11-28-ish cassette.
>>1561283Because its relevant, as underlying principle is the same.
>>1561294Are you aware that you are arguing my point? Also - hanger extenders don't work with _maybe_ wolftooth roadlink. And even then what they are doing is the same trick shimano does with Zee FR/DH. See attached pic. This is Zee DH over 11-25 cassette. It barely works on the lower gears because of the massive B-gap. Zee DH according to shimmy works over 11-28 to 11-23. Except 11-23 does not work at all - I tried.
By the way:
>>1561264 this is the experience you asked about. In my experience - shifting quality of those RDs deteriorates quickly when you go away from their "golden" ratio.