Wheel Hub: Description and Operation

Vertical link
The vertical link swivels on the upper and lower wishbones via the ball joints, and carries the hub, cartridge wheel bearing, which is greased for life, has integral seals, and is non-adjustable, hub rotor nut (hub nut and ABS rotor combined), wheel speed sensor, brake caliper, and brake disc and shield.

The position of the vertical link is determined by the movement of the steering rack, which is connected to the vertical link's integral steering arm by the tie-rod-end.