First, are these two component classes considered equal? Or is SRAM X.9 the Deore XT's "equal?"
I'm looking to upgrade my base Deore Rear Derailleur and am considering an X.7 or X.9 (with shifters) vs. a Deore XT Rear.
Any insights or real world performance comparisons out there?
Upgrading the Deore rear derailleur to XT is a good move. Functionally the XT is superior to the LX and more robust.
Now XT vs X.7 or X.9 is a hot debate and fueled by the following:
Claims that Shimano:
- ghost shifts
- does not remain set
- has a higher margin of error in set up
Unfortunately what many users don;t know is that all of these problems are easily rectifiable but your LBS wants to sell you new parts don't they.
Ghost shifts are usually due to too short a cable housing , bent rear derailleur hanger or even a sticky chain.
setting of shimano derailleurs is pretty easy. It all revolves around makin sure there are no kinks in the wire cable anywhere and making sure everything is clean. too many times i have seen cables picked off the floor and then refitted into your brand new housing
The set up namrgin of error is a moot point really because the drift is not related to the cable pull but to the degree of wear in the housing, cable stretch. Settling of the cable ends will affect the adjustment as well but this has nothng to do with cable pull since the pull ratio related to movement in the shift mechanism and resultant derailleur movement. So unless the shifter is wearing out, Actuation ration has nothing to do with setting drift.
Shimano may experience more settling due to wear inside the loop in the housing. If you're using Shimano SP41 housing and full length then the wear takes a long time to occur.
It ypically only replace outer housings once a year and in that time the adjustment requires maybe 2 or 3 tweaks.
I found that my SRAM shifters required the same amount of tweaking.