What is the difference between a car brake drum and a disc?

The disc brake has a disc fixed with the tire and rotates at the same speed. When braking, the oil pressure is used to push the brake pad to clamp the disc, and the friction generated by contact is used to brake.

Disc brake can be divided into disc brake and ventilated disc brake. Disc type, disc type, and friction disc type are all classified as disc type brakes.

The drum brake has a cast iron shaped like a tambourine, called a drum, which is fixed to the tyre and turns at the same speed.

Disc brake has better reactivity and stability, good heat dissipation, easy to replace. But its wear rate is higher, the cost is also relatively high.

Moreover, disc brakes work in much the same way that our bicycles brake -- a rubber brake disc connected to the wheels interacts with each other while braking until the wheels stop turning.

More importantly, the disc brake can be easily coordinated with the ABS system, more used in high-end cars; And the drum brake cost is lower, the absolute braking force is higher, more easy to die with one foot brake! Now more used in the general small car rear wheel, which is generally said to be the front disc rear drum.