Am I right in assuming that a ultegra 9-speed rear mech will work with a 7-speed hg casette and 7-speed dt shifters in indexed mode, or is there a difference in cabel travel due to the geometry of the derailleur cage?
The shifting should be ok, although you might find the cage is a little on the narrow side so could be noisy.
@Sig_Arlecchino started
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Am I right in assuming that a ultegra 9-speed rear mech will work with a 7-speed hg casette and 7-speed dt shifters in indexed mode, or is there a difference in cabel travel due to the geometry of the derailleur cage?