The chain seems the most likely culprit, definitely no cracks in the BB unless both frames used have the same crack! Rear wheel could be a culprit too. Wondering if its worth shelling out for a new chain?
It is for sure. A worn chain eats up sprockets as breakfast.
@Jimmy_Fingers started
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The chain seems the most likely culprit, definitely no cracks in the BB unless both frames used have the same crack! Rear wheel could be a culprit too. Wondering if its worth shelling out for a new chain?