Is the Shimano TX-505-8 rear hub compatible with 11-speed cassettes? After recently changing my bike's entire transmission, I noticed that when on the smallest sprocket, the chain is rubbing against the rear derailleur (right next to where the derailleur is attached to the frame). My mechanic tried to slowly push it outwards a bit (the derailleur), telling me it probably got bent during some mechanical shock. I accepted it as it was, although I never hit the bike and I'm always careful, regardless if I'm on the street or in the woods, trailing.
Still, even after moving the derailleur towards the exterior, the chain is still rubbing against the derailleur, when on the smallest sprocket. I've done some research and my rear hub seems to only be compatible with 8-9-10 speed cassettes (it's a Shimano Tourney TX-505). Do I have to change my rear hub?
Conversely, while pedaling, there's a constant sound coming from the rear hub/cassette (simillar to the sound the ratchets make when not pedaling but of a different pitch). It's there regardless of which speed / combination I'm using but it's different in intensity (louder on some speeds while more subdued on others). Can this also be caused by the hub's (in)compatibility with an 11-speed drivetrain? The chain, derailleurs, crankset and shifters are all 3x11 speed.
Thank you!
Edit: Some photos have been uploaded here.
Shimano says the Tourney level TX-505-8 hub is compatible with 8-10 speed cassettes.
Mountain bike 11 speed cassettes fit in on a '10 speed' freehub, because the larger inner sprockets can extend off the inner end of the freehub and not interfere with the hub and spokes. On road bikes where cassettes have narrower ranges and smaller inner sprockets the freehub has to be wider (although some wider range road cassettes do fit on 10 speed freehubs).
So, an 11 speed cassette should fit on this hub. It may be installed incorrectly. Did you put any kind of spacer on the freehub with the cassette?