Hey there! As a supplier of K003800 Air Disc Brakes, I often get asked about the differences between the front and rear K003800 Air Disc Brakes. So, I thought I'd write this blog to break it all down for you.
Design and Structure
Let's start with the design and structure. The front and rear K003800 Air Disc Brakes have some distinct differences. The front brakes are generally designed to handle more force. When you hit the brakes in a vehicle, most of the weight transfers to the front wheels. This means the front brakes need to be more robust to stop the vehicle effectively.
The calipers on the front K003800 Air Disc Brakes are usually larger. They have more piston area, which allows them to generate greater clamping force on the brake discs. This is crucial because the front brakes are responsible for a significant portion of the stopping power. On the other hand, the rear brakes don't need to be as powerful. Their main job is to assist the front brakes and help balance the braking force across all wheels. So, the calipers on the rear K003800 Air Disc Brakes are smaller in size and have less piston area.
Another difference in the design is the brake pads. The front brake pads are thicker and made from a more aggressive friction material. This is because they need to withstand higher temperatures and more wear and tear. The rear brake pads, while still effective, are thinner and made from a less aggressive material. They don't need to generate as much friction as the front pads.
Performance and Functionality
In terms of performance, the front and rear K003800 Air Disc Brakes play different roles. The front brakes are the workhorses. They are the first ones to engage when you apply the brakes, and they provide the majority of the deceleration. They need to be able to stop the vehicle quickly, especially in emergency situations.
The rear brakes, however, have a more supportive role. They help prevent the vehicle from skidding or locking up. When the rear brakes engage, they add stability to the braking process. They also help distribute the braking force evenly across all wheels, which extends the life of the brakes and improves overall safety.
One important thing to note is the braking proportioning. Modern vehicles are equipped with a system that adjusts the amount of braking force applied to the front and rear wheels. This system ensures that the front and rear brakes work together in harmony. For example, during normal braking, the front brakes might receive around 70% of the total braking force, while the rear brakes get the remaining 30%. But in certain situations, like when the vehicle is carrying a heavy load, the proportion might change to maintain optimal braking performance.
Maintenance and Durability
Maintenance is another area where the front and rear K003800 Air Disc Brakes differ. The front brakes tend to wear out faster than the rear brakes. This is because they do most of the work. You'll probably need to replace the front brake pads and discs more frequently.
When it comes to maintenance, it's important to keep an eye on the brake fluid levels. The front brakes use more brake fluid because of their larger calipers and greater piston area. If the brake fluid level is low, it could indicate a problem with the front brakes. You should also check the brake lines for any signs of leaks or damage, especially on the front brakes.
The rear brakes, while they don't require as much maintenance, still need to be inspected regularly. Make sure the brake pads have enough thickness and that the calipers are functioning properly. Neglecting the rear brakes can lead to uneven braking and potential safety issues.
Compatibility and Applications
The front and rear K003800 Air Disc Brakes are designed to be used together as a complete braking system. They are specifically engineered to work in harmony with each other and with the vehicle's braking proportioning system.


These brakes are suitable for a wide range of applications. They are commonly used in commercial vehicles, such as trucks and buses. They are also found in some high - performance cars. The front and rear K003800 Air Disc Brakes offer reliable and efficient braking performance, which is essential for these types of vehicles.
If you're looking for other types of air disc brakes, we also supply K013176 Air Disc Brakes, K082453 Air Disc Brakes, and 640322947R Air Disc Brakes. Each of these brakes has its own unique features and is suitable for different applications.
Why Choose Our K003800 Air Disc Brakes
As a supplier, we take pride in offering high - quality K003800 Air Disc Brakes. Our brakes are made from top - grade materials and are manufactured to strict quality standards. We ensure that each brake is thoroughly tested before it leaves our facility.
We also provide excellent customer service. If you have any questions about the front and rear K003800 Air Disc Brakes or any of our other products, our team of experts is always ready to help. We can offer technical advice and guidance to ensure that you choose the right brakes for your vehicle.
If you're in the market for reliable air disc brakes, we'd love to have a chat with you. Whether you're a fleet manager, a mechanic, or an individual vehicle owner, we can provide you with the right solutions. Contact us to start a procurement discussion and find out how our K003800 Air Disc Brakes can meet your needs.
References
- Automotive Brake Systems Handbook
- Technical Manuals of Air Disc Brakes
- Industry Reports on Commercial Vehicle Braking Systems




