FIELD: transport engineering. SUBSTANCE: invention relates to devices aimed at increasing cross-country capacity of vehicles. Wheel has extensible lugs located on periphery of holder installed on wheel rim. Some ends of lugs are curved and hinge-mounted on chuck plate secured on wheel disk. Holder is installed for rotation on rim by means of pressure ring and is provided with holes to catches fitted on pressure ring and designed for locking the catches. Rods of catches are mechanically coupled with control lever installed in cab connected with holder brake. EFFECT: improved efficiency of device in operation. 4 dwg
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