Software Update 3.6 for Brose e-Bike

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The Software Update 3.6 for Brose e-Bike motors has been available since 6 November 2015. In an interview with Peter Schlitt, Managing Director of ADP Engineering GmbH, we take a look at the improvements this brings for ROTWILD e-bikes and ask him why it’s worth updating to the latest version.

Which ROTWILD e-Bike models is the Brose software update available for?

The new software is the standard software for the 2016 model year. This means that it’s already installed as standard on all new models: R.C+ HT, R.C+ FS, R.X+ FS, R.E+ FS and R. T+ HT. Customers with a 2015 model can have the new software update installed via their specialist dealer.

What improvements does the update bring?

The software update provides noticeable benefits for the rider. Power development from the motor has been significantly optimized. This ultimately leads to a clear improvement in handling, which in turn results in better riding characteristics. This is primarily attributable to the considerably higher power output, especially at medium and high cadences, a uniform power output across the entire range of revs and a more homogeneous support when accelerating from a standing start. In addition, delay in the drive system has been almost eliminated. The resulting immediate response provides greater safety on technical terrain. Another important feature is the optimized temperature management, which ensures the best possible conversion of output into mechanical power and maintains the temperature at a constantly low level.

Why did ROTWILD decide to go into partnership with Brose for its e-bikes?

Brose approached us as an automotive supplier and wanted to develop an optimum bicycle drive system with our engineers from the outset. This development partnership allows us to exert a substantial influence on key parameters of electric mobility in connection with the e-MTB. The Brose System enables us to develop the battery and display as we see fit. One example was that it allowed us to design the battery and motor in the best possible way to fit the compact space available. This is an important prerequisite in order to guarantee optimum geometry and kinematics – and therefore make sure that the riding dynamics are similar to a classical MTB. In terms of noise level, quality and weight, too, the Brose drive system provides a convincing solution and emphasizes the fun of riding. Nevertheless, we should always clearly point out that e-MTBs are not e-motocross bikes. They are MTBs with new range-extending opportunities and are not designed purely for drive power. Regardless of which power setting the drive system is on while you are riding, the highly responsive sensors ensure that the bike fully retains the character of a sporty MTB.

What does the future hold? Where can the greatest innovations be expected in the development of e-bike drive systems?

There are many advances to come in the field of batteries. Cells will gain a higher capacity while design space and weight will remain unchanged. This year – our second with the IPU – ROTWILD has already achieved a leap in performance of more than 12%. Ultimately, there will also be a series of optimizations in battery management, leading to an increase in efficiency of cell utilization due to better control and monitoring. A strong boost – in other industries as well – will come from reducing recharging times through rapid charging. There are a number of new developments in store for the future. And what can we expect in terms of drive systems and components. Drive systems will also continue to steadily evolve. Efficiency will also increase in the future, while at the same time it should be possible to significantly reduce performance losses due to heat generation. A number of innovations among e-bike-specific components can also be expected. More ride comfort and less wear are top priorities for development. Gear changes are being adapted to match transmission ranges. In future, an interruption in tractive power may enable smoother gear changes and also reduce wear. And as in most areas of life, communication and connectivity will also become increasingly important. Everything here revolves around the display. There will be all possible versions of “mini remote displays” through to integrating rider’s own smartphones. New intelligent possibilities such as personalising support modes are a further future option for more riding fun. This all sounds very exciting, thank you for the


The use of e-MTBs remains a heated discussion topic. We have summarized a few of the arguments in the debate concerning e-MTB vs MTB in this information chart

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