Yeah the cassette is solid and the tooth in question looks normal. Have heard it suggested that it might be a manufacturing defect but this seems very odd.
Going to try replacing the chain as a cheap first option.
@MrSweary started
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Yeah the cassette is solid and the tooth in question looks normal. Have heard it suggested that it might be a manufacturing defect but this seems very odd.
Going to try replacing the chain as a cheap first option.