Originally Posted by
Bill Kapaun
What RDER do you have?
It might also not be index compatible???
IF that's the case, even having the correct number of cogs to match the shifter may still result in funky shifting.
Is that rear derailer? It's marked SIS, so I think that means indexed, right? Can't find any model number, but on the pulley, it says 'maximum 30t.'