Originally Posted by
09box
Upon looking at my bike, it is a Tiagra RD-4601 with MA stamped on top of it. Looking on Shimanos website, there is no 9 speed version of this RD and only a 10 speed. Am I missing something here?
It's not uncommon for the RD to be 1 "step" above the FD/shifters, quality wise.
MA is Jan, 2014
Last edited by Bill Kapaun; 04-29-18 at 05:31 PM.