Originally Posted by
79pmooney
+1
Enough to see is a lot. I have lots of old cogs and freewheels that are past new chain use with no visible wear at all outside the bare steel shine of the tooth concave. Grump's post was my first thought when I saw the photo. Checking the indexing and hanger is like checking the brake fluid and drums/discs on a car with completely bald tires.
And yes, the OP might be able to ride a new chain into behaving on the small cogs but that will be because he has rapidly aged that new chain to sufficiently stretched.
I'd be more likely to agree with you if the OP will only confirm what is meant by the chain skipping.
There also is the possibility that this isn't a skip of the chain. But a dirty or sticky pawls in the FW that don't engage or don't engage fully.
If I was asking a question here, I'd want to know all the possibilities and not just have everyone on the same bandwagon. I am okay if my possibilities are not what the OP's problem turns out to be. .