Originally Posted by
jimc101
2 posibilities -
2 - it got ground down during riding - i.e. it hit rocks/a kerb which was stronger than the metal.
Two teeth out of 40-50 got worn down by repeated strikes with rocks or curbs, but none of the other teeth were affected?
Nope, not a possibility if you think about it for very long. $20 says that there's another pair of shortened teeth behind the crankarm, and I'd love to know how those would get worn down with the crank in the way.