What type of rotor surface provides the best braking performance with new pads?

A smooth, flat surface on a rotor is essential for achieving the best braking performance with new brake pads. This surface allows for optimal contact between the rotor and the brake pads, maximizing friction, which is necessary for effective braking.

When the rotor surface is smooth and flat, it ensures uniform pad wear and consistent performance, as there are fewer imperfections to disrupt the contact area. This results in better heat dissipation as well, reducing the chances of brake fade during use. Adequate surface smoothness enhances the sealing of the pads to the rotor, which is crucial for stopping power.

In contrast, surfaces that are rough, uneven, or pitted can create inconsistent contact, leading to irregular pad wear and potentially decreased braking efficiency. They can also lead to increased noise, vibration, and a decrease in the overall lifespan of both the pads and the rotors. Thus, a smooth, flat rotor surface is fundamental for maximizing braking efficiency and safety with new brake pads.