However, because the trackless steerable transfer trolley is derived from the rail electric flat car, the manufacturing cost is relatively high, which brings inconvenience to the further promotion of the market. Therefore, further optimizing the product structure of the trolleyless electric flat car and reducing the manufacturing cost of the trackless steerable transfer trolley is the most important task of promoting the trackless transfer trolley.

For the trackless steerable transfer trolley below 20 tons, solid rubber tires can be used, especially the pneumatic solid rubber tires. The two drive wheel bearing seats adopt standard split type bearing seats, and the two-way wheel structure adopts the engineering vehicle front axle steering structure. It can save a certain cost and at the same time, can form a standardization and serialization of the trackless steerable transfer trolley, and create conditions for the mass production of the trackless transfer trolley.