The biggest news from Bosch for the 2026 ebike season is without question the new Bosch Performance Line PX motor. With the Performance Line PX, Bosch expands its ebike drive system portfolio with a motor specifically designed for comfort, efficiency, and smoothness in trekking and city riding. The motor made its debut at Eurobike 2025 in Frankfurt. Time to take a closer look: What technology powers the Bosch Performance Line PX? How does it compare to the well-known Bosch Performance Line CX? And what are the first ride impressions?
1. Introducing the Bosch Performance Line PX (BDU347Y) drive unit
2. First ride impressions with the Bosch Performance Line PX
3. Comparison: Bosch Performance Line PX vs. Performance Line CX
4. E-Bikes with the Bosch Performance Line PX drive unit
1. Introducing the Bosch Performance Line PX (BDU347Y) Drive Unit
With the Performance Line PX, Bosch supplements its drive system with a motor that positions itself performance‑wise between the sporty CX and the more comfort‑oriented Performance Line. The Bosch PX motor was developed specifically for trekking and touring e‑bikes, where powerful yet smooth and controlled pedal assistance is required. This gives manufacturers a new, versatile mid‑range option that can be easily integrated into existing model lines.
The Bosch Performance Line PX is delivered in its standard configuration with torque of 85 newton meters, a peak power of up to 600 watts, and maximum assistance of 340 percent. These values can be individually adjusted via the eBike flow app if desired – for more dynamics or greater range, depending on preference. In its highest configuration, the PX delivers up to 700 watts, provides a maximum torque of 90 newton meters, and supports up to 400 percent. This places the drive unit just slightly below the new CX motor, which is designed for sporty e‑MTBs with 750 watts and 100 newton meters.
Despite these performance figures, the PX remains surprisingly light. At only 2.9 kilograms, it is slightly heavier than the CX (2.7 kg) but still remains in the very lightweight range. The motor mount corresponds to the Bosch smart system standard and allows easy integration into existing frame constructions.
Particularly noteworthy is the balanced riding behaviour of the motor. According to Bosch, the PX’s sensors respond extremely precisely to pedal pressure, ensuring a sensitive yet powerful response – especially when starting or under load. Longer tours with luggage should also be significantly more comfortable as a result. Depending on need, the motor assists up to 25 km/h, and in auto mode, it even adjusts power automatically depending on the situation. As soon as no support is needed, the drive unit decouples almost resistance‑free from the bottom bracket. This provides a more natural riding feel, especially during descents or sporty riding.
In addition, the PX is compatible with various supplementary functions. The electronic shifting solution eShift allows automatic gear selection, which provides additional convenience, especially in city traffic. Bosch eBike ABS can also be used in combination with components from Magura, TRP, or Shimano and significantly enhances riding safety – especially in wet conditions or during abrupt braking.
Also, to technology and riding comfort, Bosch places special value on sustainability: the motor housing is made of 40 percent recycled aluminium. Some of the plastics also use materials from the circular economy. With this, Bosch once again underscores its commitment to making modern e‑bike systems powerful, functional, and environmentally conscious.
Technical Data in Overview
Bosch eBike System: The smart system
Rated continuous output: 250 W
Maximum power: 700 W
Max. power at a cadence of 70 rpm: 550 W
Max. power-to-weight ratio, approx.: 250 W/kg
Support up to max.: 25 km/h
Maximum possible drive torque: 90 Nm
Maximum support level: 400 %
Weight, approx.: 2,9 kg
Gear types: derailleur gearing, hub gearing
Compatible with: eShift, eBike ABS, coaster‑brake options
2. First Ride Impressions with the Bosch Performance Line PX
Our first field test is conducted on a Haibike Adventr FullNine ebike. The goal is to experience the drive under real conditions in trekking use. And right at the outset: our first impression is extremely positive. Already in the first few meters, the extraordinarily quiet running behaviour of the PX motor is evident. The drive is so quiet that you almost forget it in normal riding. Even under higher load or in turbo mode, the noise level remains remarkably low – a real benefit for anyone who wants to ride in peace and quiet without disturbance.
Despite the torque being limited to 85 newton meters in the test setup – instead of the potential 90 newton meters – the motor proves to be strong. This is true even on steep climbs and loose gravel. The support engages pleasantly and harmoniously yet remains powerful enough to ride confidently through more demanding terrain, even with luggage.
A small drawback emerges regarding gearing. Although we can test a Shimano Di2 gearbox with automatic function – which works excellently in principle – the PX motor does not support the Rollshift function. This means that no gear changes take place in neutral. You must pedal even during longer descents. The automatic shifting therefore only works while pedalling. Riders who know and appreciate this feature from the CX may miss it, particularly when braking at a traffic light or riding downhill.
Nevertheless, the electronic automatic gearstick remains a real convenience feature – especially at a constant cadence. The pedalling cadence can be set, and everything else is controlled automatically. In our case, the ideal range is between 80 and 85 revolutions per minute. This allows for a very relaxed ride on flat terrain. On fast downhill sections, however, the cadence can sometimes be a bit high. In those moments, manual override of the automatic by shifting via lever helps.
In terms of safety, the test eBike is also impressive: equipped with Bosch eBike ABS in combination with Shimano MT420 brakes, the system offers secure handling even during targeted braking on gravel. The front wheel never locks, and we always retain full control. The fact that this anti‑lock braking system will soon work with more affordable components makes it interesting for a broader audience.
Conclusion – Bosch Performance Line PX in Test
The first test of the Bosch Performance Line PX leaves a very positive impression. What stays in our memory:
Advantages:
- Extremely quiet motor operation – ideal for relaxed tours
- Powerful, harmonious support already at 85 Nm
- Very good response behaviour on climbs and loose terrain
- Automatic gearbox with Shimano Di2 works smoothly
- ABS proves reliable even with mid‑range brakes like Shimano MT420
Disadvantages:
- No Rollshift function – automatic shifting only works while pedalling
- Automatic cadence not suitable for all riding situations, e.g., on descents
For trekking use, the Bosch PX motor is an all‑round successful solution: powerful, quiet, comfortable – and already a clear recommendation for anyone looking for a modern, reliable e‑bike for everyday and touring use.
3. Comparison: Bosch Performance Line PX vs. Performance Line CX
At first glance, the Bosch Performance Line PX and the Performance Line CX operate in a very similar performance class. Both drives provide powerful assistance, belong to the bosch smart system, and are designed for more demanding usage scenarios. Nevertheless, there are clear differences – both in technical conception and riding experience.
The CX motor has been the benchmark in the sporty e‑MTB segment for years. With a maximum torque of up to 100 newton meters, a peak power of 750 W, and features like Extended Boost, it is clearly designed for dynamic riding on technically demanding terrain. The CX reacts quickly, powerfully, and directly – ideal for steep climbs, rough trails, and sporty riders.
The new Bosch PX motor, on the other hand, has been specifically developed for trekking and touring. Although it reaches nearly the CX level in its highest configuration- 90 newton meter torque and 700 W peak power – it focuses on a significantly quieter and more harmonious character. The assistance is delivered more evenly and softly, which is perceived as more pleasant on longer tours and in everyday use.
Another difference lies in the functions: the Performance Line CX currently supports more eShift features. In particular, the Rollshift function, where the derailleur actively responds to current riding speed to shift to a start gear even while stationary, is missing on the PX. This may be especially important for e‑bike riders who are frequently in city traffic or who enjoy full automation during shifting.
In terms of noise development, the PX has a clear advantage. While the CX is audibly active under full load – especially in e‑MTB use – the PX remains pleasantly quiet even at higher support levels. This makes it the ideal choice for those who value a discreet, quiet riding experience.
4. Ebikes with the Bosch Performance Line PX Drive Unit
The first e‑bikes with the new Bosch Performance Line PX motor are already available online – among others from KTM. In our shop, you will now find several models equipped with the new drive unit. These include:
Images: Bosch eBike Systems, KTM Fahrrad AG