I have a 7 speed Exage RD that I would like to swap out .
Most likely I will stay with the 7 speed set-up, maybe put on a 8-9 comaptable down the road if it fits.
Can I use a 8-9 Shimano RD such as a 105 or ultegra back there with the current 7 set-up?
Could I use a triple 8-9 RD even if I have a double in the front? My reason is that I may want to through a LARGE
cassette in the back one day.