Badass Box 4 for Fazua

TYPE: Fazua

VENDOR: Badass Box

154,00 €

Payment & Shipment
Customer reviews

Badass Box 4 for Fazua

The Badass Box Fazua is only compatible with the sensor shown (top picture) if it is located on the chain stay (area marked red in the bottom picture).

The Badass Box 4 completely removes the 25 km/h speed limit of e-bikes with Fazua mid-mounted motors. This means that the full potential of the Fazua drives can finally be used - which means that you can ride much faster than before with full motor support!

The Badass Box 4 has the advantage that it can be put on and taken off in no time with just one hand, so that you can activate or deactivate the tuning at any time. After attaching (=Tuning On), the Badass Box transmits a modified signal contact-free - i.e. without electrical connection to the motor or intervention in the motor electronics - so that the preset speed limit can be exceeded.

Due to its function, the e-bike display will show an incorrect speed when tuning is active. This also applies to values derived from it. Our tip: Simply use GPS-capable additional devices such as smartphones or bike computers to display the correct speed and other riding data.

The Badass Box 4 has the advantage that the legal status of the e-bike can be quickly restored (motor support up to 25 km/h). All you have to do is pull off the Badass Box and push the spoke magnet back to its original position.

Every Badass Box is Made in Germany and is double-checked for correct functionality during production.

The most sophisticated Badass Box ever

Thanks to various improvements, the Badass Box 4 is the best version of this proven tuning tool so far. Here are the most important advantages over the previous models:

-The housing has been redesigned and made slimmer, so that there can no longer be any installation situations that are too tight.

-The O-ring of the previous version has been replaced by a patented snap lock, so that the Badass Box can be pulled off or put on even more easily and quickly. In addition - at the customer's request - an optional fastening safety device by means of a cable tie has been provided on the snap lock.

-The CR2 battery has been replaced by a more powerful AAA battery. This only needs to be changed once a year, or after more than 7000 km. The specially developed, patented field enhancement technology FEET ("Field Enhancement & Elimination Technology") also contributes to the increased range. The battery can be changed without tools in a short time; suitable replacement batteries are available almost everywhere in the trade.

-For protection against moisture and mechanical stress, the electronics of the Badass Box are glued into the housing with a special potting compound and completely sealed.


In contrast to some other tuning tools, the engine does not have to be opened for the installation of the Badass Box 4.

For the first installation, you have to mount the supplied spoke magnet instead of the original spoke magnet. Although the supplied spoke magnet works exactly like the original magnet - it is necessary so that the patented field amplification technology works when the box is mounted.

The Badass Box 4 itself must be mounted via the Fazua speed sensor next to the rear wheel. As soon as the snap lock engages, the box is securely fastened (optional additional fastening by means of cable ties is also possible). After putting the Badass Box on the sensor, you only have to move the spoke magnet towards the edge of the housing in the direction of the snap lock - now the tuning is active and the 25 km/h speed limit is lifted!

To cancel the tuning, simply remove the box and move the spoke magnet back to its original position. Now the motor support ends again - just as usual - at 25 km/h,

Badass Box 4 Fazua - Compatibility

E-bikes with Fazua mid-mounted motors.

Scope of delivery

-Badass Box 4 for Fazua e-bike drives
-AAA battery
-Spoke magnet with lobe screw and 5 mm spacer bushing

Technical data

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

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 Fazua

Badass Box 4 for Fazua

154,00 €