Thread: Chainring
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Old 09-28-17 | 01:02 PM
  #11  
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ThermionicScott
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Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

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.
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