Originally Posted by
crazyotte
Short or medium?
Also: confusion... Does SRAM make a short cage X.9 9spd RD? Or only short caged 10spd... and doesn't the shifter determine the actuation, i.e. how many speeds it has?
Short cage RDs work fine with a single chainring.
SRAM 9 and 10 speed derailleurs are not interchangable. The shifter
AND rear derailleur must match.