Rely on tested quality and order wheel brake cylinders and accessories directly online.

Reliable braking power

Wheel brake cylinders are important elements in the brake system – they drive the brake linings against the drum or disk when the brake is applied. A functioning cylinder is essential for an even braking effect on all wheels. You should react promptly to wearing parts such as seals or leaking cylinders to ensure lasting braking power and safety.

High level of safety thanks to precise components

In the store, you will find both new wheel brake cylinders and suitable repair kits for existing cylinders. These kits contain seals, pistons and other wear parts that you can use to repair your cylinder without having to replace it completely.

Wheel brake cylinder

The special case for trucks: compressed air instead of hydraulics
While the wheel brake cylinder in its classic, hydraulic design (as described in the basic text) is mainly used in light commercial vehicles and older systems, the primary brake actuator in heavy goods vehicles is the air brake. The function of the wheel brake cylinder – namely the conversion of control pressure into a mechanical movement for braking – is performed here by the air brake cylinder (brake chamber). This robust component converts the pneumatic pressure that comes from the main brake valve into the massive mechanical force that acts on the brake calliper via the S-cam (in the case of drum brakes) or via linkages (in the case of disc brakes). The quality of its diaphragms and seals is critical, as air loss impairs the function of the entire brake system.

Integration of service and parking brake
A crucial safety aspect of truck brake cylinders is the integration of the parking and emergency brake function. This is achieved by the spring-applied brake cylinder, which combines two chambers: The service chamber is pneumatically controlled for normal service braking. The second chamber contains a strong mechanical spring which is automatically activated when the pressure drops (e.g. when the vehicle is parked or in the event of an air circuit failure) and locks the vehicle. The precise function of these spring accumulators is essential for compliance with legal safety standards in truck traffic.

Accessories and maintenance precision
The accessories around the truck brake cylinder, such as the push rod, clevises and fastening elements, must be able to withstand extreme tensile and compressive forces. As the brake cylinders are the only connection to the mechanical actuation of the brake, the utmost precision must be observed during assembly and maintenance. In particular, the exact length of the push rod and the correct adjustment of the brake linkage are crucial for a uniform braking effect on all axles. The use of high-quality accessories in OE quality is not only a question of durability, but also a direct factor for road safety and compliance with the legally prescribed braking distances of the heavy commercial vehicle.

What should you look out for when buying:

BREMSTYPE

The wheel brake cylinder must match your axle and brake system (drum or disk) in order to work correctly.

SEALING AND MATERIAL QUALITY

Make sure that the repair kit contains high-quality seals that are resistant to pressure and temperature.

EXISTING SUSPENSION

Check whether the replacement or repair kit can be installed in your existing wheel cylinder without having to reconfigure the mounting points or lines.

Expert Guide: Everything You Need to Know About Bike Brake Cylinders & Accessories

The wheel brake cylinder converts the incoming control pressure into mechanical motion and presses the brake shoes against the drum or disc. It is therefore the component that generates the braking force directly at the wheel—a prerequisite for consistent braking performance on all wheels.

The classic hydraulic wheel brake cylinder is used primarily in light commercial vehicles and older systems. In heavy-duty vehicles, this function is performed by the air brake chamber: It converts pneumatic pressure into mechanical force, which acts via S-cam mechanisms (drum brakes) or linkage (disc brakes).

A spring-loaded brake cylinder combines two functions in a single component: The service chamber pneumatically handles normal service braking, while the second chamber contains a powerful spring for the parking brake and emergency brake. If the pressure drops—when the vehicle is parked or in the event of an air leak—the spring engages and securely locks the vehicle in place.

Typical signs include leaks (brake fluid leaking or audible air escaping), uneven or diminishing braking performance, and a cylinder that does not fully release. Since this involves brake safety, such symptoms should be checked immediately.

If the seals and pistons are worn, a cylinder can often be repaired using a repair kit instead of replacing it entirely. It is important that the kit contains seals that are resistant to pressure and temperature. If there are scratches, corrosion, or damage to the housing, a complete replacement is required for safety reasons.

The cylinder must be compatible with the brake type and axle system (drum or disc) and with the existing mounting points and lines. For truck brake cylinders, the exact length of the push rod and the correct adjustment of the brake linkage are particularly important—they are crucial for consistent braking performance on all axles.

We carry replacement parts and accessories for trucks, trailers, buses, vans, and agricultural vehicles—including both premium brands and compatible OEM and aftermarket parts as cost-effective alternatives. This means you can find the right solution for nearly every common commercial vehicle.

Your brake system is
100 % functional again!

With new cylinders or high-quality repair kits, you can ensure full braking performance – without compromising on safety and reliability. Choose the right kit for you, order online and get your brakes back in top condition quickly.