Roaddog – World’s Largest Motorcycle

You’ve seen this black and white picture of a gigantic motorcycle with a guy on it, but what’s the story?

The name of the bike is the Gelbke Motorcycle Company’s Roaddog and it is the World’s largest motorcycle. I say this in present tense because the bike is still around and it is now displayed in the National Motorcycle Museum.

Gelbke Motorcycle Company's Gigantic Roaddog Motorcycle

The rider is William “Wild Bill” Gelbke and he built the first Roaddog in 1962. This 17 foot long and 3,280 motorcycle monstrosity has a 4-cylinder 152 cubic inch Chevy Nova engine, automatic transmission, two forward gears, and even a reverse. It has been said that it was reliable enough to where Gelbke put 20K miles on it in the first year.

In 1965 Wild Bill built the Roadog II (an improved version of his first giant creation) and later he also built what he hoped were going to be productions motorcycles called the Gelbke Auto-Four. Only a handful of the Auto-Fours were built and although they were a smaller motorcycle by comparison to the Roaddogs, they were a lot bigger when compared to even the largest motorcycles made by other manufacturers.

One of the infamous stories was when Will Bill, who was living in Chicago at the time, decided that we wanted to enjoy the good steaks and beer in Texas so he hopped on the Roaddog, rode to Texas, enjoyed his steak and beer, and then rode back to Chicago.

So what happened to Wild Bill? He died in 1978 in a shootout with the police…he may have passed, but this gigantic motorcycle and the stories about Wild Bill still survive today.

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