The module removes the 25 km/h speed restriction and allows speeds of up to 45 km/h (28 mph).

Compatible with e-bikes equipped with a Bosch Performance Line CX motor and a rim magnet.

Important: This tuning only works with bikes that have a rim magnet. Models without a rim magnet are not supported.

If you're unsure, use our configurator to select the right tuning module for your e-bike.

Your Benefits

• Uses the original rim magnet—no additional speed sensor required.
• Easy installation with a wire clamp directly on the motor.
• Invisible after installation.
• Supports Performance Line CX Gen4 (BDU37xx) and Gen5 (BDU38xx).
• Automatic calibration, ready for immediate use after installation.
• Controlled via the bike's control unit —no smartphone required. 

Features

• Can be conveniently turned on/off using the buttons on the control unit.
• Adjustable speed limit between 25–45 km/h. The last setting is saved.
• Tuning is always deactivated when the bike is turned on.
• Option to enable a "softer speed limit behavior" (Dynamic Mode), significantly smoothing out the otherwise abrupt cut-off at the speed limit.
  
  

Important Notes

• Installing this module requires removing the motor. Specialized knowledge is necessary. If you lack expertise, have the tuning installed by a specialist.
• The tuning is mounted at a predefined location on the motor. Some bike models may not have enough space, making installation impossible.
  You can find a list of known incompatible e-bike models here. This list is updated regularly.
• With tuning activated, the speed displayed above 21 km/h and the distance measured will be lower than actual. The odometer will show a reduced mileage after using the tuning.

Technical Specifications

• Housing dimensions: 48mm × 48mm × 6mm
• Cable length: ~140mm
• Weight: 0.021kg
• Power consumption: 0.3W
• Supply voltage: 12VDC
• WEEE Reg. No.: DE35476192

Scope of Supply

• Tuning module
• English installation and user manual
• 2 mounting clips
• 2 cable ties

Videos

Installation example: Cube Stereo Hybrid, Performance Line CX Gen4 (BD37xx)

Installation example: Cube Stereo Hybrid, Performance Line CX Gen5 (BDU38xx)

Software Update Notice

After installation, do not perform any software updates on the Bosch drive system. Compatibility with future software versions cannot be guaranteed.

Overview of the software versions we have tested so far:
https://blog.volspeed.de/bosch-smart-system-overview-software-versions-677/?lang=en

Legal and safety information / product liability

• Operation of the e-bike on public roads is no longer permitted after installation of the module. Use is only permitted on private property or on designated test and race tracks.
• Damage caused in connection with the operation of the e-bike is no longer covered by private liability insurance after installation.
• Liability, warranty and guarantee claims against the dealer or manufacturer of the E-bike expire or are severely restricted.
• The e-bike is subject to higher mechanical stress due to operation at higher speeds. This results in additional safety risks.
• The installation and operation of the module is at your own risk. The manufacturer accepts no liability for damage associated with the installation and operation of the device.
• Please inform yourself about possible further technical and legal consequences before installing the device.