Badass Box 4 for Bafang

TYPE: Bafang

VENDOR: Badass Box

154,00 €149,00 €

You Save: 5,00 € (4%)

Payment & Shipment
Customer reviews

Badass Box 4 for Bafang

Attention: Only compatible with the sensor shown above!

A simple but highly effective tuning solution for e-bikes with Bafang mid-mounted motors. The Badass Box 4 completely removes the 25 km/h speed limit of the drive so that you can finally use the full potential of your Bafang motor. The annoying speed limit is finally a thing of the past - really get going and ride much faster with full motor support!

The Badass Box 4 is easy to install - unlike many other e-bike tuning tools, the motor does NOT have to be opened for initial installation.

Legal within seconds

A big advantage of this tuning tool is that you can attach or remove the Badass Box in seconds if you want to restore the (legal) original condition of your e-bike. Thanks to a patented snap lock, this is now even faster than ever before!

This tuning tool is battery-powered. For the new Badass Box 4, the previous CR2 battery has been replaced by a more effective AAA battery (included). If the battery runs out, you can replace it with a new one at any time, without any tools. Suitable replacement batteries are available practically everywhere in the shops. You can assume that the battery needs to be replaced once a year.

Thanks to the specially developed FEET field enhancement technology, the battery has a very long range ("Field Enhancement & Elimination Technology").

Robust and resistant

The electronics of the Badass Box 4 are glued into the housing with a special potting compound and completely sealed, ensuring optimal protection against moisture and mechanical stress (the potting compound even originates from the automotive industry). Each box is tested for correct function before and after potting.

The Badass Box 4 is a quality product Made in Germany.

Contactless E-Bike Tuning

After plugging in, the Badass Box transmits a modified signal without contact, so that the speed limit can be exceeded. There is no direct electrical connection to the motor; and there is no intervention in the motor electronics or software. Unintentional damage to the engine is therefore impossible.

Please note: Due to the special mode of operation of the Badass Box, the e-bike display will show an incorrect speed (also applies to values derived from it).

Tip: Simply use GPS-based additional devices such as smartphones or bike computers to display the correct speed.

Badass Box 4 for Bafang - Installation

Installing the tuning tool is easy. The Badass Box 4 has a slim, design-protected housing and must be mounted on the chain stay using cable ties. Then the speed sensor of the e-bike must be unscrewed and placed on the box.

During the first assembly, the original magnet of the e-bike must be replaced by the supplied spoke magnet. This works in exactly the same way as the original magnet, but the Badass Box spoke magnet is necessary so that the patented field amplification works when the Badass Box is attached.

After the sensor has been placed on the Badass Box, the spoke magnet must be moved towards the edge of the housing in the direction of the snap lock. If the spoke magnet touches the box, simply place the spoke magnet as close as possible to the Badass Box and turn it 90° - that's it, the installation is complete and you can take off!

Badass Box 4 for Bafang - Technical data

Dimensions: 61 x 43 x 15 mm
Weight: 27g (with battery 37g)
Battery: 1.5V AAA battery (IEC R03)

Badass Box 4 for Bafang - Compatibility

This Badass Box is compatible with e-bikes with Bafang mid-mounted motors. The tool has been successfully tested with Bafang M500 and M800 motors.

Attention: The Badass Box 4 for Bafang is only compatible with the sensor shown above!

Scope of delivery

Badass Box 4 for Bafang
AAA battery
Spoke magnet with lobe screw 

    Payment & Shipment

    Delivery time, Shipping costs, Minimum order value und Payment methods:

    Delivery time

    Delivery time is 1-8 business days within Germany. Postal delivery time outside Germany may take longer.

    Shipping area

    We ship to Belgium, Bulgaria, Denmark, Estonia, Finland, Germany, Greece, Ireland, Iceland, Italy, Croatia, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Austria, Poland, Portugal, Romania, Sweden, Slovakia, Slovenia, Spain, Czech Republic, Hungary, Cyprus.

    For shipping to Germany please use our german shop.

    For a solution to Switzerland and Liechtenstein please see here.

    We do not ship to the USA, France, Canada (including all overseas territories) and generally outside the EU.

    Shipping costs

    The shipping costs for Germany are 3,50 Euro. The shipping costs are waived from an order value of 180 Euro. For countries within the EU the shipping costs are 9,90 Euro. The shipping costs are waived from an order value of 300 Euro. We ask you to cover the cost of any return shipment yourself. Please note that customs fees may apply in third countries outside the European Union.

    Minimum order value

    The minimum order value is 25 Euro. Only from this amount you can use prepayment or PayPal and bank transfer as payment methods.

    Maximum order value

    The maximum order value for orders outside the EU is 1.000 Euro. The maximum order value within the EU is 12.500 Euro.

    Payment in advance bank transfer

    Please transfer the total amount with your order number to our account which you received in the confirmation email. Please note that bank transfers within Germany can take up to three working days. Transfers from abroad, especially from Austria and Switzerland, usually arrive very quickly. From other countries, transfers can take a little longer on average.

    Payment in advance Paypal

    At the end of the order process you will be redirected to the page of Paypal. There you can initiate your payment. As soon as the Paypal transaction is completed, the status of your order will change in the store. The goods will then be shipped as soon as possible.


    Comparison of e-bike tuning products




    Badass Box

    RedPed / BluePed /






    Sx2 Dongle


    Software (Module)
    Box Module Module Module Module (Kit)
    Module /
    Module /
    Range of functions ***** ***** * ***** **** *** *** *** *** / ** *

    Easy installation of the tuning

    ***** ***** **** ** ** ** ** ** / * ** / * *

    Invisible after installation

    ***** ***** * ***** ***** ***** ***** ***** ***** / **** ****

    Switching on / off while riding

    Gerät, Display
    App, Display
    (App), Display
    Display, Magnet
    ***** / ****
    Display /
    Dongle, (Licht)

    No more tuning Module at the bike

    ***** ***** ***** * * * * * * / **** ****

    Invisible dismantling

    ***** ***** ***** ***** ***** ***** ***** ***** ***** / *** ***

    Easy dismantling

    ***** ***** ***** ** ** ** ** ** / * ** / * *

    Correct display of km/h

    * *****
    Display, App
    Display, App
    * ****


    ***** ***** ***** ***** ***** ***** ***** ***** ***** *****


    * ***** * ***** ***** ***** ***** * * *

    Price range in euros

    169 to
    189 to 299 149 to 154 219 to
    159 to 179 139 to
    139 to
    89 to
    89 to
    139 to


    Customer reviews

    Important: Tuning measures on e-bikes and e-scooters mean that they are no longer permitted for use on public roads. Legally permissible use is therefore only possible on private property or - if permitted - in competitions. Driving an e-bike or e-scooter modified by tuning measures on public roads can lead to criminal liability for driving without a license as well as driving without insurance coverage. Tuning measures on the e-bike and e-scooter can lead to a loss of warranty rights and manufacturer warranties. In addition, tuning measures can lead to a loss of insurance coverage and accident victim assistance benefits in the event of accidents. The e-bike (or e-scooter) modified by tuning measures is exposed to an additional load due to the higher speed, which can lead to safety risks.

    Badass Box 4 for Bafang

    Badass Box 4 for Bafang

    154,00 €149,00 €