Free shipping from 70€ within Germany & 150€ worldwide. Tuning for private property only. Products are not covered by § 22a StVZO.

SpeedBox 1.2 B.Tuning for Bafang (3-pin connector)

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Chip activation: LIGHT button/ SpeedBox app
Maximum speed: 50 km/h
Actual values ​​up to 23 km/h
then actual values ​​only in the application
Compatible with engines:
Bafang Max Drive M300
Bafang MaxDrive M400
If you update the software of your e-bike, first uninstall the SpeedBox from the e-bike, update the software, reinstall the SpeedBox in the e-bike.

Basic tuning chip for your Bafang e-bike.

With SpeedBox 1.2 you can double the speed limit of an e-bike from originally 25 km/h to 50 km/h. After installing the chip, real data up to 23 km/h is shown on the e-bike display.

How does the SpeedBox 1.2 work?

You activate the SpeedBox 1.2 chip on the pedelec control panel. After pressing the LIGHT button, the active light symbol appears briefly on the display and you can now drive at 50 km/h. Press the LIGHT button again to turn off the chip function.

SpeedBox App for SpeedBox 1.2 B.Tuning

The SpeedBox app specially developed for SpeedBox 1.2 B.Tuning uses Bluetooth technology to connect your e-bike to your smartphone. After downloading the app and pairing the smartphone with the e-bike, you can see the current data and riding parameters on the smartphone display. You can save individual trips, compare with friends and track your own performance. So you can enjoy the ride to the fullest and leave the parameter check for later.

Options for the SpeedBox app:

  • tuning control
  • Speed ​​limiter setting
  • Storage and display of driving data
  • engine diagnostics

SpeedBox B.Tuning is not required to use the SpeedBox App. However, it's a great accessory that gives you a complete view of your performance.

Download the SpeedBox app to your smartphone before ordering the SpeedBox 1.2 B.Tuning chip. Try the demo version, get to know all the functions and at the same time make sure that the APP is fully functional on your smartphone. To connect to the SpeedBox B.Tuning chip, your phone must have Bluetooth 4.0 or higher.


Anyone can do the fitting of a chip in an e-bike with simple tools! We've written detailed instructions and created videos so you can install it from the comfort of your own home. Removing the tuning chip is as easy as installing it. If you have some assembly problems, don't hesitate to contact us.

If you want to install a SpeedBox on a brand new bike, you need to ride that bike at least 1km before you start the chip for the first time.


Please note that operating pedelecs modified in this way on the road may conflict with the laws in force in some countries. The manufacturer assumes no responsibility for damage resulting from the use of SpeedBox products. E-bikes equipped with SpeedBox products may not be used on roads, cycle paths and public areas. E-bikes equipped with SpeedBox products may only be used at your own risk and under your own ownership. Using SpeedBox products may void your e-bike warranty.

We recommend the use of additional safety features and protective products to avoid injury.