... support, stable5. control system MOS is high efficient, drive smoothly and steadily6. low-energy, easy to maintain, ... rubber, high-elastomer, pneumatic,polyurethane polyurehtane3.2Wheel size drive side φ250×80φ250×80φ250×80φ250 ... ×60φ150×60φ150×603.5Wheels, number(x=drive wheel)drive side/ load side 1x+2/41x+2/ ... 41x+2/41x+2/43.6Track width(front)drive sideb10(mm)8868868868863.7Track width(rear)load ...