Originally Posted by
Ex Pres
It'll work. The indexing is in the shifter, not the derailleur, and all 105/600 RDs have the same actuation ratio. Just don't put a 7s DuraAce shifter with it and you'll be fine
Interesting. So it will index perfectly as if it was a 7 speed derailleur?
If that's the case what's the difference between the 1050 and the rd 1051 model (105 7 spd rd). Am I correct to assume that the 1051 would be capable of indexing up to 8 speeds?