Which one of the following is NOT included in a typical anti-lock brake system?

A typical anti-lock brake system (ABS) consists of several key components that work together to enhance vehicle safety by preventing wheel lock-up during braking. Among these components, the hydraulic actuator plays a critical role by controlling the brake fluid pressure to the brakes; the anti-lock brake control module processes data from the wheel speed sensors to determine when to modulate braking; and the wheel speed sensors monitor the rotational speed of each wheel to detect any signs of lock-up.

The inclusion of a bead in the choices provided does not align with the function or structure of an anti-lock brake system. A bead is typically associated with tire construction or rim seating rather than the mechanics involved in the braking system. Therefore, it is correct to identify that a bead is not a component of a typical anti-lock brake system.