The floating multiple-piece rotors have a few advantages over their single-piece counterpart. First, they are lighter than rotors of the same size. The center is made out of aluminum which lightens up the total weight of the rotor. They dissipate heat better and run cooler which will help to prevent brake fade.

What are the advantages of floating discs?

Since this is both rotating and unsprung, it benefits the acceleration, braking, and handling of the vehicle. Secondly, it is better able to handle the large temperature changes that a brake disc experiences.

Do floating rotors move?

Semi floating rotors allow radial movement only to allow for thermal expansion. In other words, when the rotor diameter increases when hot.