The SdKfz 2 Kleines Kettenkrad was an unusual vehicle that was a hybrid between a tracked vehicle and a motorcycle, and was the smallest tractor used by the German Army.

Designed by the Waffenamt, it was put into production by NSU Werke AG of Neckarsulm. It carried the original designation of VersuchsKfz 620, but was commonly known as the Kettenkrad.
The Kettenkrad used a front-end wheel and suspension from a motorcycle, and a scaled-down half-track suspension using interleaved road wheels. It was powered by a 36 hp 4-cylinder engine, the same as used in the Opel Olympia passenger car, and could reach speeds of 70 km/hr.

The vehicle was used for supply purposes, and could also tow small artillery guns. It proved itself in a variety of conditions, particularly in very adverse terrain.

The Kettenkrad was introduced in 1941, and 8,345 of them were built. After World War II a number of them were rebuilt from spare parts and put to civilian use.

The vehicle on display was a 25th anniversary gift from Mr. Günther Loher in 1981 to the Panzertruppenschule, where it was restored in 1985.