So i've got this bike, my commuter. it's got gears and everything.
The rear cassette started causing problems so I replaced it.
few weeks later, the big ring and chain also started causing issues so I replaced them.
Now I'm a bit thick so I stay in one gear most of the time so that particular cog on the cassette had worn out a bit and now no longer accepts the new chain (it skips under load). I have to use the two cogs either side of it. But I really like that cog and miss it.
1. Try and use that cog as much as possible to get it and the chain loving each other?
2. Never use that cog and wait for the chain to wear down till it fits it nicely
3. just replace the cassette again?