Brake discs, also known as rotors, are a crucial component of disc braking systems. Mounted directly on the wheel hub, they rotate with the wheel and provide a surface for the brake pads to clamp against. When the driver applies the brake pedal, hydraulic pressure forces the brake calipers to press the pads against the disc, creating friction that slows the wheel’s rotation. Most brake discs are made from cast iron due to its durability and heat resistance, while high-performance vehicles may use carbon-ceramic discs for superior performance and lighter weight. Brake discs are available in solid, ventilated, drilled, or slotted designs, each offering specific benefits in cooling and braking efficiency. Ventilated discs, for example, have internal air passages that allow heat to dissipate faster, reducing the risk of brake fade. The lifespan of brake discs typically ranges from 50,000 to 100,000 kilometers depending on driving conditions. Worn or damaged discs can cause vibrations, squealing noises, and reduced braking performance. As an integral part of modern vehicles, brake discs provide safe and effective stopping power, making them essential for passenger cars, motorcycles, trucks, and even high-speed racing vehicles.