6 Common Myths About Brake Discs Debunked

In the automotive world, brake discs are critical components that ensure safe and optimum and performance of vehicles. However, around these essential parts circulate numerous myths and misconceptions that can lead to confusion, misinformed decisions and at worst, serious safety issues. At MAT Foundry Group, a leader in the engineering and manufacturing of high-quality automotive components, we believe in giving our clients and readers accurate information. Today, we'll try and debunk some common myths and misconceptions about brake discs, and make sure you’re aware of their importance, functionality, and maintenance requirements.

Myth 1: All Brake Discs Are the Same

One of the most prevalent myths is that all brake discs are created equal, with no significant difference in performance across brands or types. This couldn't be further from the truth. The reality is that brake discs vary significantly in materials, design, and manufacturing processes. For instance, cast iron discs are known for their durability and heat dissipation qualities, while bi-metal discs offer superior performance in high-demand situations, such as racing, due to their lightweight nature and excellent heat resistance. In short, the choice of brake disc depends on vehicle requirements, driving conditions, and performance expectations.

Myth 2: Expensive Brake Discs Are Always Better

While it's true that quality often comes with a price, the most expensive option isn't always the best choice for every vehicle or situation. High-performance brake discs, such as those made from bi-metal materials, offer exceptional benefits but come at a hefty premium. For everyday driving, a well-made cast iron disc can provide the safety, reliability, and performance most drivers need. It's essential to choose brake discs based on compatibility with your vehicle and driving habits rather than price alone.

Myth 3: Brake Discs Don't Need Regular Inspection

Brake Disc Myths - MAT Foundry

Another common misconception is that brake discs require little to no maintenance. In reality, brake discs wear down over time and can suffer from issues such as warping, cracking, or glazing. Regular inspections are crucial to identify wear and tear early and to ensure that the brake system functions at its best. This includes checking for thickness variation, surface damage, and ensuring that the disc's surface is even. Ignoring these signs can lead to decreased braking performance and, ultimately, safety risks.

Myth 4: Drilled and Slotted Discs Are Only for High-Performance Vehicles

Drilled and slotted brake discs are often associated with high-performance or racing vehicles due to their enhanced heat dissipation and the ability to maintain braking efficiency under extreme conditions. However, these benefits can also be ideal for regular vehicles, especially those driven in hot climates or hilly terrain where brakes may be prone to overheating. While not necessary for every vehicle, drilled and slotted discs can improve braking performance and longevity for many drivers.

Myth 5: Replacing Brake Pads Is Enough to Restore Brake Performance

While replacing worn brake pads is crucial for maintaining braking performance, it's not the only factor to consider. The condition of the brake discs is equally important. Worn or damaged brake discs can reduce the effectiveness of new brake pads, leading to compromised braking ability. In some cases, resurfacing the discs can restore their condition, but often replacement is necessary to ensure optimal performance and safety.

Myth 6: Warped Brake Discs Are the Main Cause of Vibration When Braking

Debunking Brake Disc Myths - MAT Foundry

Vibration during braking is commonly attributed to warped brake discs. However, brake disc distortion is more accurately described as thickness variation or disc thickness non-uniformity. This condition can be caused by uneven wear, excessive heat exposure, or incorrect installation. While this issue does affect braking performance, it's important to diagnose the exact cause of vibration to address it effectively, as other factors, such as suspension issues, can also contribute.


Understanding the facts about brake discs is essential for making informed decisions regarding vehicle maintenance and safety. At MAT Foundry Group, we're committed to providing our clients with products that meet the highest standards of quality and performance. By debunking these common myths, we hope to enhance your knowledge and ensure your vehicle remains safe, reliable, and ready to perform at its best. Remember, when it comes to brake discs and overall vehicle maintenance, accurate information and regular inspections are the key to longevity and, most importantly safety on the road.

Explore MAT Foundry's Step-by-Step Guide to Brake Disc Installation and Maintenance here.

Found this post useful? Why not share it with your network:

Instagram Feed

Latest Vacancies

Ref: LEM2024ISMA
Standort: Eurac Lemgo, Lemgo, Germany
Ref: MFE14022024
Standort: MAT Foundries Neunkirchen, Neunkirchen, Germany
Ref: MME13022024
Standort: MAT Machining Europe / PTR, Altenburg, Germany
Ref: PTR06022024
Standort: PTR, Altenburg, Germany