What part compresses the brake pads against the rotors?

The component responsible for compressing the brake pads against the rotors is the caliper. When the brake pedal is pressed, hydraulic pressure is generated by the master cylinder, which sends brake fluid through the brake lines to the caliper. The caliper houses the brake pads and, as it receives fluid pressure, it moves the pads inward. This movement causes the pads to squeeze against the rotating brake rotor, creating the friction needed to slow down or stop the vehicle.

The caliper plays a crucial role in the braking system's effectiveness by ensuring that enough force is applied to the pads to achieve optimal braking performance. This means that the caliper is vital for converting the hydraulic pressure into mechanical force that directly impacts the rotors. Understanding the function of the caliper is essential for grasping how disc brake systems operate in vehicles.