Kettenkraftrad HK 101 (from German klein 'small' Ketten 'chains/tracks' and Kraftrad 'motorcycle'), shortened to Kettenkrad (pl. Kettenkräder). It was used...

meaning tracks, and krad being the military abbreviation of the German word Kraftrad, the administrative German term for motorcycle), to pull small artillery...

did not let the design become a sales success. The magazine "Auto und Kraftrad" (Car and motorcycle) described the car as a "trimmed Goliath tricycle"...