so a few nights ago, i my bike was literally as silent as its ever been. it had been that way for some time.
yesterday i installed a new dura-ace cog and now i'm getting all kinds of chain noise.
just like... the type of noise you would expect from a regular road bike.
the ONLY thing that changed was the cog.
i triple checked my chain line and it seems spot on.
any ideas to get it back to silent?


i was thinking maybe the cog i had previously was worn with the chain stretch (if there is any), so perhaps a new chain would solve things.

set up is miche track hub, dura-ace cog, generic front ring, and kmc chain