The geometric dimensions and manoeuvrability of a forklift in narrow aisles are important in industrial enterprises and warehouses. In this paper, the influence of the geometric dimensions of the AGV forklift and the transported load on the dimensions of the aisle width is studied. The difference between aisle widths and turning radii required for the movement of the forklifts is shown, which affects to the efficiency of industrial sectors and warehouses. At the same time, the turning radii of three and four-wheeled AGV forklifts were analyzed and represented mathematical expressions.