Front sprocket:
The rear sprocket was worn more on one side than the other. Metal on one side had folded over more and the corner on that side was worn down more:
By comparison, the other side of the sprocket was relatively square:
In addition, the o-rings on the chain were missing and damaged on one side of the chain, whereas the other side of the chain's o-rings were intact. Some rollers are damaged and missing as well:
Closeup of a couple damaged o-rings:
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