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Bosch eBike Systems has announced the release of the new Performance Line CX-R race motor as well as available upgrades for the Performance Line CX motor.
Bosch says the new system is built for top-level trail performance and offers 100 Nm of torque, 750 W of power, and support up to 400% of pedal input, adding that the Performance Line CX-R delivers fast response, precise control, and introduces an exclusive Race mode for top-level demands, “Built with aerospace-grade materials and cutting-edge sensor technology, the drive unit is lightweight and reacts instantly to pedal input, pushing performance to the limit. The custom-designed Race and emtb+ modes ensure precise, controlled power delivery on every ride.”
The new Performance Line CX-R is the most powerful drive unit in our portfolio. We have made no compromises when it comes to materials, software, and sensor technology, enabling experienced riders to explore and push the limits of their skills on difficult trails. The new eMTB+ riding mode brings the power of the CX-R to the trail in a controlled manner. Thanks to DynamicControl–a type of traction control in the new mode–propulsion remains controlled even on demanding terrain, steep sections, and wet surfaces – Claus Fleischer, CEO of Bosch eBike System
Here are further details from the release:
Uncompromising support with the exclusive Race mode.
The balance of performance and control is key across any challenging terrain. For cyclists with differing needs, there are several customisable riding modes to choose from. The exclusive Race mode on the Performance Line CX-R offers direct power delivery and maximum support, enabling instant acceleration and full power up to top speed, with up to 400% of additional assistance. For tackling large rocks and tricky tree roots. Extended Boost-further enhanced in Race mode-provides extra thrust. This makes it ideal for competitions or eMTB riders looking to push their limits on technical trails. Riders can also fine-tune performance settings to their preferences using the eBike Flow app.
New eMTB+ mode for demanding trails
The dynamic and progressive MTB+ mode is another key innovation for physically demanding trail rides. Bridging the gap between eMTB mode and Race mode, it balances the full power of the latter with unique control. Based on the rider’s input, eMTB+ mode delivers controlled support with up to 400% assistance, in addition to the rider’s own power. Power is developed in a natural and agile manner thanks to DynamicControl, which can be precisely regulated via the rider’s input. eMTB+ mode intelligently alternates between Dynamic Control and the familiar, direct response, based on the riding situation. Just like in Race mode, the performance values of eMTB+ mode can also be fine-tuned in the eBike Flow app to precisely suit the rider’s needs and riding situations.
For ambitious MTB riders, four fine-tuned, dynamic riding modes are now available: Tour+, eMTB, eMTB+, and Race. Performance values (W, Nm), dynamics, and response can be customised via the eBike Flow app.
Premium materials offer a lightweight, dynamic riding experience
The new Performance Line CX-R is built with premium materials to maximise performance and durability in any riding situation. The space grey coloured,powder-coated magnesium housing enhances durability, while the corrosion-resistant titanium crank spindle and high-quality ceramic ball bearings keep the weight down to just 6 pounds and ensure smoother operation. With its top-tier construction and powerful electronics, the Performance Line CX-R offers reliability and durability. When descending, the decoupling of the external drivetrain (chain, chainring, cassette) from the internal drivetrain (freewheel, gear system, motor) reduces mechanical noise, allowing riders to fully immerse themselves in the trails.
High-quality sensor technology delivers power at the perfect moment
To ensure the Performance Line CX-R delivers power exactly when needed, its sensor technology measures pedal input up to 1,000 times per second. This includes precise torque measurement and a high-resolution cadence sensor. Inertial sensors (IMU) track acceleration and rotation in six dimensions, detecting tilt angles, inclination, and vibrations. On the trail, this results in maximum, controllable power being available at the most optimal moments–whether that’s a powerful sprint out of a bend, a precise start on a slippery surface, or whilst tackling steep, technically challenging climbs.
The first eMTBs featuring the new Performance Line CX-R are expected to be available from dealers in autumn 2025.
Performance Line CX Updates
From July 2025, riders can boost the Performance Line CX (BDU384Y) performance via the eBike Flow app, tailoring it to their setup, while the new eMTB+ mode delivers precise power instantly. The Kiox 400C display, advanced eBike ABS/ABS Pro sensors, and custom eShift settings are joining the Bosch eMTB range.
- Performance Line CX gains in performance values
- eMTB+ mode offers even greater dynamics and control
- Kiox 400C display integrated into the top tube
- Refinements to eBike ABS and eBike ABS Pro
- eShift setting M+ selects the right gear whilst coasting
eMTB riding is part of our DNA. We enable eMTB riders to live out their passion to the full, with optional additional power and even more customisation options for different riding situations and needs. The increased performance values of the Performance Line CX in combination with the new eMTB+ mode offer even more power and agility on demanding trail rides – Claus Fleischer, CEO of Bosch eBike Systems
Customisable power for the Performance Line CX
Thanks to a software update, riders can fine-tune their drive unit’s performance to match their individual needs on the eBike Flow app. Using a simple slider, the maximum power can be increased from the standard 600 watts up to 750 watts. Torque can also be boosted from 85 Nm to 100 Nm, and pedal assistance can reach up to 400%. This means eMTB riders will feel a significant boost in power, an advantage that is especially useful on steep, technical uphill trails.
Riders can now choose how much of the available power they want to use, within the limits set by Bosch, however, Bosch warns that higher settings put more stress on the bike’s mechanical parts and reduce battery range. More power also means faster wear and shorter rides. The performance upgrade for the current PerformanceLine CX (model BDU384Y) will be available as a free over-the-air download starting in July, once respective bike manufacturers have approved it for their eBike models. Manufacturers also define the maximum performance limits that riders can adjust within.
