More dynamic, more agile and quieter than ever before 

If there is one eBike motor that is synonymous with eMountain biking, it’s the Bosch Performance Line CX. Specially developed for eMTBs, it has established itself as a permanent fixture in the mountain bike scene since its launch almost ten years ago (2015) and has defined sporty eBiking as a field in its own right.

Since then, the drive unit has undergone several stages of evolution and continues to set standards in terms of riding experience and motor characteristics. The pioneering, progressive/dynamic eMTB mode and many other technical developments complement the Performance Line CX, making the riding experience on the eMountain bike unique. 

With 85 Newton metres of torque, a maximum power of 600 watts and up to 340 percent support, the new Performance Line CX (BDU384Y) delivers the ideal balance of power, dynamics, efficiency and range. 

The sound of the trail and nothing else 

On trails and discovery tours, many cyclists want a motor that is as quiet as possible, combined with a natural riding experience. Bosch has optimised the gearbox of the new Performance Line CX with a view to achieving a good balance between power delivery, efficiency, and noise levels.

When riding downhill, the external drivetrain (chain, chainring, cassette) is decoupled from the internal drivetrain (freewheel, gearbox, motor). This further reduces the mechanical noise generated by comparable drive units on the trail. The full focus remains on the trail and nature. 

The weight of the Performance Line CX has also been reduced by around 100 grams compared to the previous version. The drive unit is extremely robust. Its magnesium housing withstands the toughest conditions. A black powder coating protects against stone chips and damage as well as corrosion. 

The power of the new Performance Line CX unfolds dynamically and precision matched to the relevant riding manoeuvre and accurately follows the pedal input. This is made possible by re-engineered sensor technology. 

The ideal balance of power, efficiency, and range 

For eMountain bikers, it is not just performance data that is crucial, but above all the precise fine-tuning of the motor. This determines the flow factor on the trail. “With 85 Newton metres of torque, a maximum power of 600 watts, and up to 340 percent support, the new Performance Line CX delivers the ideal balance of power, dynamics, efficiency, and range,” says Claus Fleischer, CEO of Bosch eBike Systems.

Full focus on the trail and nature: Bosch has optimised the gearbox of the new Perfomance Line CX with a view to achieving a good balance between power delivery, efficiency and noise levels. 

Sensitive sensor technology and dynamics on a new level 

The power of the new Performance Line CX unfolds dynamically and is precisely matched to the relevant riding manoeuvre and accurately follows the pedal input. This is made possible by re-engineered sensor technology. Several high-performance sensors precisely measure the pedal input – more than 1,000 times per second.

The many sensors used include a high-resolution cadence sensor and precise torque measurement technology. Inertial sensors (IMU) also measure acceleration and rotation speeds in six dimensions, and recognise inclination and tilt angles as well as vibrations. This means that the eMTB “knows” how steep the ascent is and whether eBikers are on a forest path or a root-covered trail.

“Whether for sensitive starts on steep trails or powerful, perfectly controlled exits from bends: With its precise, sensitive response behaviour, our new drive unit allows sporty eBikers to experience unique riding dynamics for the perfect eMTB experience.”

Claus Fleischer, CEO of Bosch eBike Systems.

The drive unit responds highly sensitively to changes in acceleration, the rider’s pedal power and the current speed. Thanks to the newly interpreted sensor signals, eBikers always receive the right motor power – sensitive, controlled and immediate. Or gentle, restrained and reliable for long 

If eBikers have to stop on challenging uphill terrain, it is important to get out of this situation in a controlled manner. With the new hill start assist you can ride off in a relaxed manner and with full traction. Thanks to the sensors, the eMTB knows how steep the slope is and provides optimum support. Also new: With the walk assistance feature, the drive unit adapts the pushing speed to the walking speed.