Steering knuckle

[1] The terms spindle and hub are sometimes used interchangeably with steering knuckle, but refer to different parts.

The wheel assembly is shown attached to the knuckle at its center point.

Their designs differ to fit all sorts of applications and suspension types.

The end of the drive mechanism would then have the necessary mounting studs for the wheel/tire and/or brake assembly.

Therefore, the wheel assembly would rotate as the drive shaft (or half-shaft) dictates.