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What are Brake Pads and where are they Located?
Your vehicle’s brake pads are major components in a disc brake system. A disc brake system consists of brake calipers, pads, and rotors. The rotors, also commonly referred to as brake discs, bolt onto the wheel hubs or axles, and spin at the same rate as the wheels. When you press the brake pedal, hydraulic pressure is transmitted to the caliper, which acts as a clamping device pressing the brake pads against each side of the rotor. The friction that this creates is what allows the vehicle to slow to a stop. In a nutshell, your vehicle’s brakes convert kinetic energy to thermal energy.
Most cars and trucks today have four brake discs, one for each wheel in the front of the vehicle and one for each wheel in the rear of the vehicle. Each disc will have a set of two brake pads, for a total of four brake pad sets on the vehicle – two in the front and two in the rear (for a total of eight brake pads). However, a lot of vehicles have rear drums instead of rear brake rotors. In this case, the vehicle will have two front brake rotors and two rear brake drums, and therefore it will have a total of two sets of front brake pads (for a total of four brake pads).
Automotive brake pads are made up of a friction material formula bonded together by resin and adhered to a backing plate. It is this friction material that makes contact with the rotor which creates the friction needed to stop your vehicle. On the back side of the plate there is usually a shim, which is staked or glued on. The purpose of the shim is to create a barrier between the plate and the piston of the caliper, reducing noise.
Types of Brake Pad Materials
There are three brake pad materials widely used in general automotive applications: semi-metallic, ceramic, and organic (non-asbestos). Which formula is best is often the subject of debate. The truth is there is no such thing as the perfect brake pad as each type of friction material has strengths and weaknesses. Let’s touch on the basic pros and cons of each.
Semi-metallic brake pads provide great stopping power and maintain good friction capability throughout its thermal capacity, providing better wear at high temperatures. Because of this, semi-metallic pads are more resistant to brake fade than other materials. Semi-metallic brake pads are the often the choice of original equipment material for many heavier vehicles such as pickup trucks, SUV’s, and vans. The cons of these types of disc brake pads are that they are more aggressive and occasionally noisier than the softer brake pad material choices. Metallic brake pads tend to be harder on the brake rotors as well.
Most brake pads considered “ceramic” are technically ceramic enhanced, which means they consist of a mixture of metallic and ceramic fibers. The benefits of this material are that it can dissipate heat well, and can provide good stopping power while being less abrasive. This allows for longer pad life and less noise, while being easier on the rotors. Another nice feature of ceramic brake pads is the fact that the dust they create is light gray in color, which coincidently matches the color of most wheels. Ceramic brake pads however do not perform as well at high temperatures when compared to semi-metallic pads. They also tend to be the highest priced of the three.
Early automotive brake pads were originally created using asbestos, which we all know is a harmful material when inhaled. Modern organic brake pads (non-asbestos) are made from other natural materials such as glass, rubber, and Kevlar. The advantages of this type of brake pad is that they are very soft, which means they are quieter and easier on the rotors. Organic brake pads are also more environmentally friendly than other materials. Given the fact that organic pads are softer means they wear much quicker, and have less stopping power than ceramic and semi-metallic pads. Organic brake pads, although less common, are still used on some cars and trucks today. However, organic pads are frequently used more on motorcycles, ATV’s, and bicycles than on automobiles.
Choosing the Correct Brake Pads
All vehicles have a recommended pad material suggested by the car or truck's manufacturer, which is determined by a variety of factors such as vehicle size and designed use. Understanding the benefits and drawbacks of each material will help you decide which pad suites you and your car or truck.
When are Replacement Brake Pads Needed?
On the side of the brake pad (or pads) sits a wear indicator. The wear indicator is usually a small metal tab; when the pad wears down to a certain point this indicator comes in contact with the rotor, which causes the initial squealing “metal on metal” noise. Once you hear this extremely unpleasant noise, it is time to replace your disc brake pads. Not only will you be thankful, but those around will be as well. Many vehicles, especially European makes, use electronic wear sensors. These sensors will illuminate a service brake light in the instrument cluster when the pads wear to their discard thickness. It is important to replace worn pads as soon as they reach this predetermined thickness to prevent possible damage to your vehicle’s brake discs and to ensure proper braking. Being able to safely stop your car is equally as important as being able to start it.
Need a Replacement Brake Pad Set?
Having properly functioning brakes on your car or truck is an absolute must for your own safety as well as for the safety of others. Since brake pads are an important component of a vehicle’s disc brake system, if they are worn out, then replacement brake pads are needed ASAP; your vehicle is a hazard on wheels until they are replaced. At 1A Auto, we carry a full line of professional grade aftermarket brake pad sets designed to meet or exceed to original equipment standards. Our aftermarket brake pads are the very same used by professional technicians and installers across the country. In addition, we also carry OEM brake pads for select makes and models. From front and rear brake pads, to ceramic, organic and semi-metallic brake pads, you’ll find the brake pad replacement you need at 1A Auto!
At 1A Auto, we make shopping for a replacement brake pad set for your car, truck, SUV or van easy - we're here to help you select the right part for your vehicle! Call our customer service toll free at 888-844-3393 if you have any questions about our OEM or aftermarket brake pad sets, warranty, compatibility or to purchase, or you can buy online right here at 1aauto.com. Restore the safety of your vehicle and order a replacement brake pad set from 1A Auto today!
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We employ USA based, knowledgeable support technicians. They'll help you through your project. We always make sure you get the right part. And we boast the industry's most generous returns policy. You won't find a company more passionate about auto parts than 1A Auto.