The shifting should be ok, although you might find the cage is a little on the narrow side so could be noisy.
Thanks, hadn't thought of that, I'll see what I can do.
I doubt the cage will rub: 9 speed chains are only a little narrower internally, it's 10 & 11 that are narrower externally too.
@Sig_Arlecchino started
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The shifting should be ok, although you might find the cage is a little on the narrow side so could be noisy.