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Wheel-track vehicles were a side issue. These combined the cross-country mobility of tracked vehicles with the high speed on roads of the wheeled vehicles. Different types were developed during the 1930s by Austro-Daimler and Saurer in Austria. Mobility was possible in different configurations. For example, the 0.6/1t towing vehicle ADMK could be driven as wheeled vehicle, as half track vehicle, as tracked vehicle and as wheeled vehicle with simultaneous track drive. With the larger Saurer RR 7, it was possible to change from wheeled to tracked drive during slow drive.
The smaller motor Karrette’s made by Austro-Daimler were used as transport and towing vehicles by the mountain troop, exclusively. Originally, the larger Saurer RR 7 was developed as towing vehicle for artillery. Because half-track vehicles were established for this purpose in the Wehrmacht, most of them were equipped with an armoured superstructure and were used as armoured artillery observation vehicle Sd. Kfz. 254.
Altogether, this development was not able to prevail. The theoretical advantages were outweighed by the disadvantages due to extremely complicated and vulnerable technology. Therefore, further developments of wheel-track vehicles were ceased in 1942.
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