WARNING:
before purchasing this device, it is necessary to check the “product code” of your bosch performance line cx / sx motor.
the “product code” is shown on the motor label.
in the example the two types of label used by bosch are visible and the “product codes” of the motors circled in red.
performance line sx bdu314y - manufactured from 2023
performance line cx bdu374y – manufactured from 2024
performance line cx bdu384y – manufactured from 2025
this device is not compatible with ebikes equipped with the classic magnet on the spokes or brake disc
this device is not compatible with ebikes equipped with the bosch abs system.
this device is not compatible with ebikes equipped with a gps system (bosch connect module).
VOLSPEED BOSCH RIM MAGNET (BDU37 AND BDU38)
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
INSTALLATION MANUAL
