Originally Posted by
dsbrantjr
There is no reason that the Sora derailleur should not perform its task perfectly well. Higher-level components may be lighter or better finished but all will function properly IF correctly installed and adjusted. One suggestion would be to have the derailleur hanger adjustment checked; even on a new bike it may be slightly off.
Probably a good idea, who knows what type of handling these things see before they arrive at your doorstep.