Originally Posted by
martslc
I just replaced the chain and I'm getting what I think is chain suck...
That makes me suspect a worn chainring.
I've worn out two chainrings that way, and it always happens with a new chain.
The teeth of the chainring get slightly hooked, so instead of the chain smoothly coming off the bottom of the chainring to go to the RD, the teeth hold onto the chain and pull it up into the bottom of the FD.