A Bicycle Clock

The sprockets are all chained together to provide the correct gear reductions for accurate timekeeping! It incorporates 12 bikes. 5 bikes to get a 1 to 1/60 reduction ratio (seconds to minutes), another 5 bikes to reduce the minutes to hours, and then two bikes to reduce hours to 12 hours. That’s a full clock cycle Rube Goldberg, freakbike style. More at Conceptulight

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