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The evolution of motorcycling dates to the bicycling craze of the late-1800s. Bicycle racers found they could pedal with less effort in the slipstream created behind another racer, a "pacer," and then use their reserve energy to pass that rider. As it became increasingly hard to find pacers who agreed not to win, motorized pacing machines known as motor-pacers filled the niche created by bicycle racing. Soon after, motor-pacers raced against themselves in dedicated events. “Early American Motorcycles” is on view pre-security in the International Terminal Main Hall and online at sfomuseum.org.
This image was posted on February 16, 2021.