Exploring the Differences Between Disc and Drum Brakes

Published March 5th, 2025 by Brake Pros Of Waltham

Most cars on Waltham's roads use either disc brakes, drum brakes, or both. Each type has specific benefits and works best in different situations. Understanding these differences helps car owners make better decisions about brake repairs and maintenance. At Brake Pros of Waltham, we explain these options in clear, simple terms.

What Are Disc Brakes?

Modern disc brake systems consist of several key components working together. The system starts with brake rotors, which are flat metal discs attached to your wheels. These work with brake pads held by calipers, which act like clamps. The entire system runs on brake fluid, which transfers force from your brake pedal to the calipers.

How Disc Brakes Work

When you press your brake pedal, brake fluid pushes the calipers to squeeze brake pads against the rotor. This creates friction that slows your car down. Disc brakes work well in wet conditions because water can easily flow away from the brake surfaces.

Understanding Drum Brakes

Drum brake parts include:

Hollow drum that spins with the wheel
Brake shoes that push outward
Springs that pull shoes back
Self-adjusting system

Cost Differences

The cost of brake service in Waltham varies depending on your brake type and needed repairs. Disc brake pad replacement typically runs between $150-300, while drum brake shoe replacement costs $200-400. More extensive repairs like rotor replacement can cost $300-500, and drum replacement usually falls between $250-450. These prices include both parts and professional installation.

Maintenance Requirements

Each system needs different care:

Disc brakes need regular pad checks
Drum brakes need spring inspection
Both need fluid system checks
Both require regular cleaning

Which System Is Better?

Both disc and drum brakes have their strengths. Disc brakes offer better stopping power, handle heat more effectively, and perform well in wet weather. They're also easier to service and inspect. Drum brakes cost less to maintain, work great as parking brakes, and often last longer when used on rear wheels where less stopping power is needed.