Originally Posted by
smasha
i've got the rear wheel off (unrelated maintenance) and noticed that the 11T ring is looking pretty "shark finned". the 13T ring is slightly shark finned, and the larger rings look ok. of course i won't really know until i put the new chain on it.
That 11T cog looks fine to me -- the tooth shape you see is to improve shifting. If the cog were worn, you'd see the shark-finning on the
other side of the teeth.
