What is the purpose of brake rotors?

The purpose of brake rotors is to provide a surface for brake pads to clamp against. When the brake pedal is pressed, hydraulic force is applied to the brake pads, which then squeeze against the rotors. This action creates friction, which slows down the rotation of the wheels, ultimately helping to stop the vehicle. The rotors are essential components of the braking system, as they must be designed to withstand high temperatures generated during braking and must provide a consistent friction surface to ensure effective stopping power.

The other options do not pertain to the function of brake rotors. While supporting the vehicle's weight is a crucial function of other components like the chassis and suspension, cooling brake fluid is primarily managed through the brake system's design, involving various components to dissipate heat. Regulating tire pressure is unrelated to the braking system altogether, as this is typically managed by the vehicle's tire inflation system. Thus, the focus on the rotors' role in the braking process highlights their critical importance in vehicle safety and performance.