The central innovation at Brose Drive S Mag and Co. is the optimization of the drive belt and transmission, which results in a significant increase in mileage. At the beginning of the market launch in 2018, Brose had problems with premature motor failures. However, according to the motor specialist, this is now a thing of the past thanks to the meticulous modernizations.

Lukas Zwanziger, Head of Quality at Brose E-Bike: "Initially, we were very dissatisfied with the performance of our magnesium drives, especially the S Mag. However, in close cooperation with our internal and external partners, we worked intensively on the individual weak points and continuously improved the motors. The result is the "new" S Mag, which you can rely on in any situation."

Brose implemented the first major optimization package in 2021 with the aim of significantly increasing durability. Further improvements have followed successively since then. Among other things, the company achieved a reduction in the already quiet operating noise, even at very high mileages. The latest modification has also made the drives more resistant to water ingress. Furthermore, the completely overhauled electronics and software ensure greater reliability and an even more comfortable ride. Many components have been replaced with more modern ones, meaning that the electronic components of the magnesium drives are also available without restriction.

To ensure that the measures implemented achieve the desired effect, Brose subjected the magnesium drives to intensive endurance tests in resin. During this process, over 50,000 kilometers were covered and around one million meters of altitude were mastered. To ensure the long-term success of the revisions, S Mag and Co. undergo around 175,000 hours of testing in special endurance test rigs at the Berlin plant every year. In this way, procedures can be reliably tested and undesirable events can be identified and rectified at an early stage.

"The aim of our measures was clear: we wanted e-bike fans to be able to enjoy the natural riding experience and the impressive power of the S Mag and our other magnesium drives without any worries and over the long term," says Zwanziger.

The success of these efforts is reflected in Sram's decision, according to Bros. The US component manufacturer was looking for a drive for its Eagle Powertrain e-bike system with automatic transmission and found the solution in the S Mag. Since the end of September 2023, the Brose motor has been at the heart of models from the four popular e-mountainbike manufacturers Propain, Transition, Nukeproof and Gasgas.

brose.com