The tie rod is an important connecting component that connects the two rear wheels of a car. It connects the left and right steering arms, can synchronize two wheels, and adjust the toe in. It is also an important component for ensuring safe driving of automobiles.

The straight and tie rods are the two main components of a car's steering system. A tie rod is a rod connected between the steering arm and the left arm of the steering knuckle, which transmits steering power to the steering wheel and controls the wheels. The tie rod connects the left and right steering arms.

One can synchronize two wheels, and the other can adjust the toe in. The end of the steering tie rod is connected to the steering knuckle through a ball joint. Because turning the steering wheel directly is labor-intensive, most cars now use hydraulic steering, reducing the need for drivers to make steering more flexible and easy to operate.