The structure and the shape of a brake disc

The two most popular types of brake discs are solid and ventilated discs. Ventilated discs have cooling vanes between the braking surfaces which allows air to flow through, and has a cooling effect on the disc. More cars are becoming equipped with ventilated disc on the front brakes, and high-performance cars have ventilated discs on the front & rear.

• ■Solid disc
• ■Ventilated disc

• Straight fin

  Number of fin being 24-48 as standard
  Less number of fin → light weight
  More number of fin → higher rigidity

  

• curved vane fin

  Swirl form able to exhaust cooling air to outside smoothly

  

• Pillar type fin

  Less obstruction for wind for smoothness