Originally Posted by
JohnDThompson
That is the classic symptom of running a new chain on worn sprockets.
Yes, smaller tooth count sprockets concentrate the wear onto fewer teeth, so they wear faster than the larger tooth count sprockets.
Agree. Seems like the WT Goat Link was installed in 2018 and has worked until recently. Questioning the compatibility with the derailleur now seems like a red herring.
Replace the cassette, you dumb cheap bastard. 😉