Do brake discs and pads have slight friction?

[SanJaxon]

Brake discs and pads have slight friction. Here is an introduction about brake discs: 1. Introduction: A brake disc, simply put, is a round disc. The brake caliper clamps the brake disc to generate braking force. When you press the brake, the brake disc is clamped to slow down or stop the vehicle. Brake discs provide excellent braking performance and are easier to maintain compared to drum brakes. 2. Structure: Disc brake rotors are divided into solid discs (single-piece discs) and ventilated discs (double-piece discs). Solid discs are straightforward—they are solid. Ventilated discs, as the name suggests, have ventilation properties. Externally, ventilated discs have many holes around the circumference leading toward the center, known as ventilation channels.