All vehicles have Castor, Camber and Toe-in settings. Camber and Toe-in for most of them are very small around 2-3 degrees and not noticeable by just observing. Exceptions seems to be APE and Tatra. Castor is easier to notice in the front wheels two wheelers. It is the angle between the axis of the steering and the vertical through the contact patch of the wheel. So those American chopper bikes have huge castor angles.