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Eeyorecore
@Eeyorecore Can you explain how Exact Actuation (Road 10 & 11sp, MTB 10sp and below) = 3.1mm of cable pull with each shift?
If the pull ratio of the Exact Actuation is 1:1 then the amount of cable pull from one shift on any 10 speed SRAM shifter has to be more than one shift on an 11 speed shifter. So, the amount of cable being pulled by the different speed shifters is not the same. That would be my understanding and that is why you can use any Exact Actuation rear derailleur with different speed shifters, because it's the actual shifter which is varying the amount of cable being pulled.
AJ