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Mortise, Tenon, and Beyond: The Joinery Quiz
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Why are the threads on the left-side pedal spindle of a bicycle cut with a left-hand thread?
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Hint
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50-50
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Audience
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A
To prevent mechanical precession from unscrewing the pedal during riding
B
To allow the left pedal to be tightened with a standard clockwise turn
C
To accommodate the reverse rotation of the left crank arm relative to the chain
D
To prevent cross-threading with the right pedal spindle
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