Both drilled and slotted pattern will increase bite and help gas releasing from friction material and fade. Drilled discs have advantage of being lighter and runnung cooler. Slotted discs are with a continuous refreshing of the brake pad surface. However drilled discs are mostly not recomanded for racing application.
What is brake torque?
Brake torque also means braking power. Effective radius is distance from hub center to caliper on disc position. The force exerted by the caliper, which is determined by pistons size/area, multiplied by the effective radius equals the brake torque.
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