Differences Between Drum Brakes and Disc Brakes
4 Answers
The differences between drum brakes and disc brakes are as follows: 1. Different shapes: Disc brake pads (also called brake discs) are divided into two types, ordinary discs and ventilated discs, with a disc-shaped appearance; Drum brakes have a cast iron component that closely resembles a tambourine, called the brake drum. 2. Different applications: Disc brakes are generally mainly used in mid-to-high-end cars, while drum brakes are usually used in ordinary cars. 3. Different reaction speeds: The disc brake system reacts faster, while the drum brake system reacts slower.
The differences between drum and disc brakes are quite significant. Let's start with drum brakes: they consist of a drum-shaped housing containing brake shoes. When braking, the hydraulic system pushes the shoes outward to create friction against the drum wall, slowing the vehicle. This simple structure makes them cost-effective, which is why many economy cars still use them on the rear wheels. Disc brakes, on the other hand, feature brake pads clamping onto both sides of a rotating disc—like a hamburger—applying direct pressure for stronger, more linear braking force. Their superior heat dissipation prevents overheating-related failures. Disc brakes perform reliably during high-speed or repeated braking, especially in wet conditions where they resist skidding better. However, they come at a higher cost and require more meticulous maintenance. Personally, I believe disc brakes offer greater reliability and safety for daily driving, particularly in stop-and-go urban traffic where reduced heat buildup minimizes risks. The investment is worthwhile.
The performance difference between disc and drum brakes is quite noticeable. As someone who enjoys delving into the details of cars, I find that disc brakes offer faster response and stronger braking force, especially during emergency stops or high-speed situations, allowing the vehicle to come to a halt within a shorter distance. Their ventilated design ensures better heat dissipation, reducing the issue of brake fade. On the other hand, drum brakes are relatively slower, with a delayed braking force initiation, but they are more durable at low speeds and are commonly used in budget cars or on rear wheels, which is sufficient for daily use. However, drum brakes are prone to water accumulation and rust inside, leading to reduced sensitivity. Disc brakes are simpler to maintain—just a quick cleaning will do—but they require more frequent brake pad replacements. Overall, when considering safe driving, disc brakes come out on top, which is why most new cars now come with them as standard.
The price difference between drum and disc brakes is quite noticeable. Having driven many cars, I found that drum brakes are much cheaper, their parts are easier to find, and the maintenance costs are lower, making them suitable for budget-conscious owners. Many entry-level compact cars use them on the rear wheels to save costs. Disc brakes, on the other hand, are more expensive, with costly parts and installation, but they last longer and are commonly found in high-end vehicles or on the front wheels to improve braking efficiency. From an economic standpoint, drum brakes are more cost-effective, but disc brakes react faster in emergencies and offer higher safety margins. I suggest considering this carefully when purchasing a car.
