Roadog is a motorcycle built by engineer and motorcycle enthusiast
Wild Bill Gelbke between 1962 and 1965. A total of two were built. Gelbke, who had attended engineering school in Wisconsin and at
University of Southern California, had worked for
McDonnell Douglas and also owned two motorcycle shops in
Chicago and
Hammond, Indiana. He wanted to create a motorcycle that was dependable and was able to cruise at highway speeds comfortably for long periods.
[2] Gelbe constructed and welded the frame himself using 4130 chrome-molybdenum tubing, and equipped the machine with a
Chevrolet 153 engine and GM
powerglide transmission.
[1] The shaft drive was constructed from a Chevrolet 1-ton truck differential that was cut in half.
[1] The complete bike is 17 feet (520 cm) long and weighs 3,280 pounds (1,490 kg).
[1] Its great size and weight make the bike impossible for most people to steer until it is moving at a speed of at least 15 miles per hour (24 km/h), and when at rest it is held up by
hydraulic rams that are deployed by the driver.