Originally Posted by
ruirui
i think this is the one i need
Shimano Deore M591 SGS Rear Derailleur since this is not Dyna-Sys type, which was recommended for my ultegra 9 speed.
so beside performance, where are some places to get the parts i need for cheap?
Yeah, that's a good one with an adjuster. You can get all this stuff off Amazon.