The slots these discs are milled to the outer edge. This ensures that braking resulting gases, abrasion, dirt and water can be almost completely removed from the friction surface of the brake discs. Furthermore, it is fed through the slots, cooler "air in order to optimally counteract overheating of the brake linings and the brake disc. The additional creases on the running surfaces support this property again significantly. Because of slotting the brake pads over the entire life time of time be worn evenly and parallel.