Yesterday's post about the single tracked all terrain motorcycle designs reminded me of these WWII motorcycle tank hybrids. Very odd vehicles and I'm not really sure of the reasoning behind their construction, why the motorcycle front end was necessary isn't clear, the one site says it's for stability at high speeds and you actually could remove it in really rough terrain, but they do look interesting.
Specs say they could get up to 45-50mph with the 4 cylinder, 1478cc gasoline engine sourced from Opel, while the vehicle itself was made by NSU. It was designed to go into mountainous terrain and tow a trailer or small gun.
The web sites say there were about 8400 Kettenkrads produced during the war and over 500 afterwards. Some collectors keep them going and I think they look like a real hoot. I love stuff like this and if you dig around enough, you never know what you might find. Neat.