SpeedBox 1.6 B.Tuning for Bosch Smart System Gen 5 with Rim Magnet
The SpeedBox 1.6 B.Tuning is a Bluetooth-enabled tuning chip designed for Bosch Smart System fifth-generation Performance Line CX and CX-R motors fitted with a rear-wheel rim or valve magnet.
It removes the standard 25 km/h motor-assistance limit and connects your e-bike to the SpeedBox Connect app, allowing you to control the tuning and manage compatible settings from your smartphone.
Key Features
Designed for Bosch Gen 5 Motors
This SpeedBox is specifically designed for fifth-generation Bosch Smart System motors fitted with a rim magnet.
It is compatible with:
Bosch Performance Line CX Gen 5
Bosch Performance Line CX-R Gen 5
Rear-wheel rim or valve magnet systems
Integrated Bluetooth
The SpeedBox 1.6 B.Tuning connects to your smartphone through the SpeedBox Connect app.
The app allows you to:
Activate or deactivate tuning
Set a custom assistance limit
View riding information
Save trip data
Install compatible SpeedBox updates
Three Activation Methods
Activate or deactivate tuning using:
The SpeedBox Connect app
The WALK function
The + – + – button sequence
Always activate or deactivate tuning before or after riding, never while the bike is moving.
Straightforward Installation
The SpeedBox connects directly to the motor using compatible connectors.
Clear fitting instructions and an installation video are available to guide you through installation and removal.
Compatibility
Compatible Motors
Bosch Performance Line CX fifth generation
Bosch Performance Line CX-R fifth generation
Bosch Smart System
Bikes fitted with a rear-wheel rim or valve magnet
Compatible Displays
Bosch Kiox 300
Bosch Kiox 500
Bosch Intuvia 100
Bosch Purion 200
Bosch Purion 400
Compatible Control Units
Bosch LED Remote
Bosch Mini Remote
Bosch System Controller
Not Compatible With
This SpeedBox is not suitable for:
Fourth-generation Bosch motors
Bosch Performance Line SX motors
Bikes with a traditional spoke-mounted speed magnet
Bosch ABS systems
Enviolo Automatiq systems
Check the motor generation and magnet type carefully before ordering.
Technical Specifications
Factory-set maximum assistance speed:
35 km/h for EU software or approximately 22 mph for US software
Bluetooth:
Yes
SpeedBox Connect compatibility:
Yes
Custom assistance limit:
Adjustable through the SpeedBox Connect app
Activation and deactivation:
SpeedBox Connect app, WALK function or + – + –
Software updates:
Compatible SpeedBox updates available through the app
Minimum distance before installation on a new bike:
10 km
Speed Display Information
While tuning is active, the bike’s display may show a speed approximately 10 km/h lower than the actual riding speed.
Accurate riding information can be viewed through the SpeedBox Connect app.
For bikes using US software, the actual assistance limit after activation may be approximately 28 mph. Displayed values may differ.
Recommended Maximum Setting
The factory-set maximum assistance speed is 35 km/h.
Do not increase the selected maximum speed above 35 km/h, as higher settings may affect reliable operation and increase the risk of system errors or tuning detection.
Recommendations for Reliable Operation
To help ensure trouble-free operation:
Leave the e-bike switched on after each ride until the distance recalculation countdown has finished.
During short stops, keep one foot resting on a pedal to help prevent the countdown from starting.
During longer stops, allow at least part of the countdown process to complete.
Do not disconnect the display before the countdown has finished.
Activate or deactivate tuning only before or after riding.
Do not change the maximum assistance setting while riding.
Do not increase the preset maximum above 35 km/h.
Software Update Warning
Do not update the Bosch motor, display or Smart System software while the SpeedBox is installed.
Disable automatic software updates where possible. Manufacturer software updates may affect compatibility, cause operating faults or increase the risk of tuning detection.
Installation on a New E-Bike
Before installing or activating the SpeedBox on a brand-new e-bike, ride the bike for at least 10 km.
This allows the motor and electronic system to complete their initial setup and calibration.
Warranty Information
Installing or using a tuning chip may affect the e-bike manufacturer’s warranty.
Faults caused by Bosch system or motor software updates may not be covered by the SpeedBox product warranty.
Important Legal Notice
Installing this product may cause your e-bike to no longer meet the legal definition of an electrically assisted pedal cycle.
A modified e-bike must not be used on UK public roads, cycle paths or other public places unless it has been correctly registered, insured and approved for that use.
This product is intended for use on private land with the landowner’s permission, where legally permitted. Use is entirely at the rider’s own risk.
Always wear suitable protective equipment and make sure the brakes, tyres, frame and other bicycle components are suitable for the intended riding speed.