BTS 2023, Features

Knorr-Bremse launches new air disc brake models

Being able to rely on safe operation is one of the key principles underlying efficient transportation and modern logistics. For more than 115 years, Knorr-Bremse has been a major driving force behind road and traffic safety.

Now Knorr-Bremse is taking the next steps towards fulfilling the “Zero Accidents” vision by going on a broad-based product offensive, with the launch of the modular SYNACT disc brake family and reduced-weight NexTT disc brake for trailers.

Key products in this campaign include the modular SYNACT disc brake family, including the SYNACT Radial and axial SYNACT Compact, as well as the reduced-weight NexTT disc brake for trailers.

With more than 30 years of experience in developing pneumatic disc brakes for commercial vehicles, and over 50 million units produced, Knorr-Bremse is the global technology and market leader in this field. With the introduction of the SYNACT radial brake, the company has further expanded the SYNACT  family and adapted it for city buses.

Wheel end – the modular SYNACT family

In the 30 kNm class, the new SYNACT brake delivers new levels of performance, weight and efficiency, reducing unladen weight by up to 10kg. Fitted with the optional Active Caliper Release (ACR) system, SYNACT can also reduce fuel consumption by as much as one per cent. The new, fully encapsulated bearings further enhance the brake’s durability. With these new features, not only is Knorr-Bremse’s SYNACT able to make vehicle operations more economical; it also sets a new standard for accident-free passenger and freight transportation.

This integrated wheel-end unit comprises actuator, brake caliper, brake pad and disc. The robust disc brakes in the modular SYNACT family are energy-efficient and easy to install, with sufficient flexibility to fit changing space requirements. Typical options include, for example, a more compact axial design or a radial cylinder arrangement. The optimised weight and dimensions of the wheel-end unit provide designers of electrified commercial vehicles with considerable freedom. The modular SYNACT approach will also accommodate future solutions for minimising brake-dust emissions and electrifying the braking system.

Latest trailer tech

For trailer disc brakes, Knorr-Bremse offers the reduced-weight NexTT single-piston disc brake, the epitome of high efficiency.

The NexTT Disc Brake with ACR (Active Caliper Release).

At less than 29kg, the NexTT is the lightest 22.5-inch trailer disc brake on the market, comprising a harmonised wheel-end consisting of actuator, caliper pad and disc, optimised for 9 tonne semi-trailer axle applications.

The NexTT provides improved running clearance stability via reduced pad movement by change of the pad support and innovative taper wear compensation. This results in improved robustness, increasing the pad clearance and improving the pad mobility.

The optional Active Caliper Release (ACR) function for the NexTT helps vehicle operators to minimise costs, reduce fuel consumption and reduce their caron footprint by 10 per cent.


Sustainability and EcoDesign is at the forefront of every new technology developed by Knorr-Bremse. Knorr-Bremse has aligned its latest new product developments with sustainable goals. New product development requirements relating to the selection of materials, weight reduction, energy efficiency, and higher levels of recyclability

Plenty to see

The SYNACT and NexTT disc brake will be showcased at the upcoming Brisbane Truck Show, from May 18-21. You’ll find Knorr-Bremse at Stand 76 in the Great Hall.

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