Am I right in thinking that I can use a 10s GRX rear derailleur with 11 speed Ultegra shifters and an 11 speed cassette?
They use the same pull ratio, yeah.
@snottyotter started
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Am I right in thinking that I can use a 10s GRX rear derailleur with 11 speed Ultegra shifters and an 11 speed cassette?