Slotted brake rotors
Slotted brake rotors typically have four - eight evenly spaced shallow grooves which milled on the rotor surface. The slots provide the same benefits of cooling, as drilled holes, but with less risk of warping and cracking. All the matter is that slots usually don't extend on all surface of a rotor.
Usually slots are directed and bent so that they can cover all surface of brake pads, providing much more better ventilation, than a set of holes. For some types of grooves design can judge the state of the brake disc.
Next advantage of slots is a so-called shaving effect. It means that slots support more than a clean surface of brake pads for better contact pair – rotor and pad. Furthermore, the presence of slots works as grater, increasing braking distance.
Power Friction has a special form of slots, which reduces noise during braking.
If you're looking for high-performance disc brakes for the active street drive, Power Friction recommends a series Slotted (S-label).
