Wheel Hub: Description and Operation

HUBS AND BEARING
The wheel bearings are incorporated in the hub and are not part of a shaft or stub axle assembly. The bearing is of double row angular contact type which are permanently lubricated and maintenance free. They cannot be replaced individually. The hub is of lightweight design and centered directly on the bearing. It is pressed into the steering swivel member and secured by means of two locking rings on the outboard side of the bearing.
An ABS sensor is incorporated in the bearing.

STEERING SWIVEL MEMBER
The steering swivel member is the main component in the wheel bearing assembly and consists of a bearing housing, which is integrated with the strut, and a ball joint mounting.
The steering radius is negative, that is to say an imaginary line drawn through the swivel axis meets the ground outside the centre line of the wheel.