If you haven't been riding in a while, seeing teeth that are shaped differently from one to the next might be alarming, but as others have said, they are shaped that way by design to help with shifting. Unless the chain is skipping or something I'd say you're good to go.
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I stop for people / whose right of way I honor / but not for no one.
Originally Posted by
bragi 
"However, it's never a good idea to overgeneralize."