why are drum brakes bad

Why Are Drum Brakes Considered Less Effective?

Drum brakes have been a common feature in automotive design for many decades, especially in older models. However, as technology has advanced, many manufacturers have shifted towards disc brakes for a variety of reasons. Understanding the drawbacks of drum brakes can help vehicle owners make more informed choices regarding their braking systems.

Another issue with drum brakes is their overall performance in wet conditions. When water enters the drum, it can create a film between the brake shoes and the drum surface, leading to reduced friction and, consequently, decreased stopping power. While many modern drum brake systems feature some form of water drainage, they are still inherently less reliable than disc brakes, which are more effective in shedding water and maintaining contact between the pads and rotor.

Moreover, maintenance on drum brakes tends to be more complex and labor-intensive compared to disc brakes. Drum brakes contain numerous components, including springs and retainers, which can wear out over time. Inspecting and replacing these parts requires a deeper understanding of the brake system and more time than the relatively straightforward process associated with disc brakes. This can result in higher service costs for vehicle owners.

In terms of overall stopping power, disc brakes are generally superior. They provide a more consistent braking force and have a shorter stopping distance, especially under heavy braking conditions. The ventilated design of disc brakes allows for better airflow, which aids in cooling and reduces the risk of brake fade.

In conclusion, while drum brakes may still be found in many vehicles, particularly in older models and on the rear wheels of some lower-end cars, they are increasingly seen as a less effective option. Their inability to dissipate heat efficiently, reduced performance in wet conditions, and more complex maintenance needs contribute to their reputation as inferior to disc brakes. For new car buyers or those considering upgrades, opting for disc brakes may offer better safety, reliability, and overall driving experience. As technology continues to evolve, it's likely that drum brakes will become even more obsolete in modern automotive design.