While Harley-Davidson made its name on building some of the best two-wheeled machines to burn up the freeway, the American bike maker has been in the three-wheeled motorcycle game almost as long as it ...
It's impossible to know for sure, but scientists speculate the wheel dates all the way back to the 4th millennium before Christ. That's roughly 6,000 years from the moment in time we're at now. More ...
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