just replaced Shimano front derailleur (FD-M191) to FD-M590. And problem appears, on smallest cog chain rubs lightly on left side, and on biggest cog on right side. Just can't lower derailleur more when chain on smallest cog, cant put derailleur higher when chain on biggest cog. I think just reached limits in both directions, any ideas? Thanks
According to the data sheets for the FD-M191 and FD-M590, you should be able to run one for another provided the difference between the middle and largest cog is at least 12 teeth.
The first thing to check is if you've adjusted the front derailleur properly. Are you using a reasonable gear combination when its rubbing? If so, are you using a 9 speed chain?