To understand how the steering knuckle operates in the complex mechanism, it is necessary to understand the following. The car front wheels, which are fixed to the front suspension are needed in order to transfer the engine torque, direct vehicle management, and braking. For the first function - torque transfer - the wheels are connected with the transmission by drive shaft. Concerning the steering knuckle, the wheel hub is fixed on it, and it is also a suspension and steering element. As part of the suspension, it is connected to the Macpherson strut and to the lower arm of the front suspension. Apart from that, the braking system components, such as calipers, are fixed on the knuckle.

Concerning its detailed construction, you should know that the front wheel hub is fixed on the knuckle with two tapered roller bearings. Generally, this part has a quite complicated configuration and is made in most cases of aluminum. This part is manufactured of very durable alloys because of the high load, to which it is submitted.