-
All Exact Actuation rear dérailleurs will move a distance in direct proportion to the length of cable which is pulled by the relevant shifter, and this is why the Exact Actuation mechs are interchangeable between different speed shifters?
Yes. The derailleur is blind when it comes to speeds, all that matters is it has the same pull ratio as the shifter
-
Yes, derailleurs are agnostic to shifters as long as the ratio is the same. so Sram 2:1 (Rocket, Attack, MRX, etc) work with Shimano 2:1 ratios, basically anything before 10 speed mtb and 11 speed road.
Sram ESP and later Exact Actuation are 1:1 ratio and similarly cross compatible across generations as long as it’s 1:1.
Sram X actuation have different ratios across 11 and 12 speed and are only compatible within their own eco system.
Shimano 10 and 11 speed and up are their own can of worms.
You are reading a single comment by @user155150 and its replies.
Click here to read the full conversation.
lemonade
Eeyorecore
@user155150
Thanks for the reply, but am I right in thinking, regarding Exact Actuation only, that the same rear dérailleurs can be used between 10 and 11 speed SRAM shifters because the distance the mech moves for each speed is determined only by the shifter? The 10 speed shifter will pull more cable per click than the 11 speed shifter? All Exact Actuation rear dérailleurs will move a distance in direct proportion to the length of cable which is pulled by the relevant shifter, and this is why the Exact Actuation mechs are interchangeable between different speed shifters?