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BadassBox 4 for Shimano 2020

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by Badass
Product information "badassBox 4 Shimano 2020"
Attention, the badassBox 4 Shimano 2020 is only compatible with your bike if it has the Shimano SM-DUE11 sensor (left image) integrated in the dropout.
If the integrated sensor looks like the picture on the right, it is the older SM-DUE10 from Shimano. Then you need this badassBox 4 Shimano X-Set .
If the Shimano SM-DUE10 sensor (picture on the right) is easily accessible on your chainstay, you only need one badassBox 4 Shimano 2019 .

Badass eBikes proudly presents: the new badassBox 4 Shimano 2020

The badassBox 4 is the result of more than a year of development work. We have completely redesigned the housing, made it slimmer, which means that there are no longer too narrow installation situations.

The badassBox 4 runs on one AAA battery. You can get replacements for the supplied battery cheaply and literally on every corner. You can carry out the replacement yourself on site in a very short time without the use of tools. We recommend replacing the battery at least once a year at the start of the season. Thanks to our specially developed and patented field enhancement technology FEET (Field Enhancement & Elimination Technology), you can go a long way with one battery. To protect against moisture and mechanical stress on the wheel, the electronics are glued into the housing with a special sealing compound and completely sealed.

We develop and manufacture the badassBox completely ourselves. Before and after casting, we check each individual badassBox to ensure it is working correctly. Customer satisfaction and quality are our top priority. We are happy to answer any question – usually on the same working day. Because of the high quality and our focus on customer satisfaction, we also offer a 1-month money-back guarantee.

Short & crisp

The badassBox is attached to the chainstay of the e-bike together with the screwed-on speed sensor and removes the 25 km/h limit.

  • Contactless e-bike tuning
  • Slim, design-protected housing
  • Securing option on the housing
  • Patented Field Enhancement Technology
  • Potting compound from the automotive industry
  • Compatible with electronic circuits (Di2)
  • Double quality control
  • Made in Germany
  • 1 month money back guarantee


The integrated Shimano sensor is located in the dropout area.
To get to the sensor you have to remove the rear wheel.
Find the position of the integrated sensor in the dropout of your e-bike and loosen the screws that hold the sensor in place.

Place the sensor in the recess provided on the badassBox.

Fasten the sensor to the badassBox with the enclosed cylinder head screw (you need a 2 mm Allen key [Allen key] for this). Now you can mount the badassBox together with the sensor on the chainstay using cable ties (included in delivery).

During initial assembly, the supplied spoke magnet must be installed instead of the original magnet. Our spoke magnet works in the same way as the original magnet without the badassBox, but is necessary for the function with our patented field reinforcement when the badassBox is attached.

Reinstall the rear wheel and screw the supplied spoke magnet onto a spoke so that the magnet faces the badassBox. The spoke magnet must be aligned next to the badassBox. To check the position of the magnet on the stationary bike, lift it up at the back, turn the rear wheel (not the cranks!) and let it run. Pay attention to the speedometer or app of your bike. The displayed speed should be steady and drop off slowly as the rear wheel coasts.
If the spoke magnet touches the badassBox, the spoke magnet must be placed as close as possible to the badassBox and rotated by 90°. Complete!


The badassBox transmits a modified signal without contact, without an electrical connection to the motor, without interfering with the motor electronics or software, in order to exceed the speed limit. It is not necessary to laboriously open the motor. There is no risk of damage. If the badassBox is removed and the Shimano sensor is mounted on the chainstay or the original installation situation in the dropout and the spoke magnet is aligned with it, then the e-bike is restored to its untuned and therefore legal condition.

With all the advantages, an incorrect speed and values ​​derived from it are displayed as a matter of principle. We recommend the use of GPS-related additional devices (mobile phone, bicycle computer, etc.) for more precise driving data recording.

Technical specifications

Dimensions 61 x 39 x 18mm
Weight badassBox 28 g
with battery 39 g
battery 1.5V AAA battery (IEC R03)