Originally Posted by
VegasJen
So here's a close up pic of the chain ring I'm talking about. I put a RED arrow on the "chipped" teeth and BLUE arrows on teeth that have "scalloping", presumably from a worn chain.
Agree with everyone who said that the teeth of the big chain ring are deliberately shaped that way for shifting. In fact, this photo shows that the original owner rarely used and/or only cleaned the big chain ring.