Badass Box 4 (X-Set) for Bosch

Badass Box 4 for Bosch X-Set

This tuning set was specially designed for e-bikes with Bosch motor and Bosch sensor integrated in the dropout (see images below). The set not only contains the actual tuning tool, the Badass Box 4, but also all the elements needed for assembly (screws, adapters, etc.). You can order all the parts you need for your Bosch tuning with just one click. This saves you time and money.

The Badass Box 4 is a simple but highly effective tuning tool that completely removes the 25 km/h speed limit of Bosch e-bike motors. This allows you to finally use the full power of your powerful Bosch drive without the annoying speed limit. The tool not only works with many old Bosch e-bike drives, but also with the Bosch Gen 4 drives of 2020/21 (see below for exact compatibility).

The Badass Box 4 is a non-invasive tuning tool - this means that there is no direct intervention in the motor electronics, so no accidental damage can occur.

With the Badass Box 4, the necessary wiring has to be attached once, after which the tuning can be switched on and off by plugging and unplugging the box. Thanks to a patented snap lock and a new, slimmer housing, this is now even quicker than ever before. The original (legal) state of the e-bike can be restored at any time if required.

Please note that some conversion work is necessary to install the tuning set, so a little manual skill is required here. Therefore, please read the installation instructions below before you decide to order the tuning set.

How does the Badass Box 4 for Bosch work?

After the Badass Box 4 has been plugged in, it transmits a modified signal which overrides the 25 km/h speed limit. This means that the motor support no longer stops at 25 km/h and you can ride much faster with full support.

Important: Due to this functional principle, the e-bike display will no longer show the correct speed when tuning is active, which also applies to values derived from it. Therefore our tip: Simply use GPS-based additional devices such as your smartphone to have the correct data displayed on the road (real speed, distance covered, etc.). We recommend simply attaching the smartphone to the handlebar using special "holders".

The Badass Box 4 is powered by a replaceable AAA battery. Thanks to the specially developed and patented FEET field amplification technology, one battery goes a long way. It is recommended to replace the battery once a year at the beginning of the season. Suitable replacement batteries can be found inexpensively almost everywhere in the shops; you don't even need tools to replace them.

Installation instructions

You will find the integrated Bosch sensor in the dropout area of your e-bike. You have to remove the rear wheel to gain access to the sensor:

Now you need to locate the position of the sensor in the dropout of the bike (the sensor shape shown is an example):

Now you have to loosen the screws of the mounting with which the sensor is fixed to the dropout:

Now you need to attach the universal adapter to the Bosch sensor with a cap screw, washer and nut (all included):

Now you can attach the universal adapter, together with the screwed-on Bosch sensor, to the chain stay using the cable ties supplied:

Now you have to push the Badass Box onto the adapter until it locks into place. Then reinstall the rear wheel. Now you just have to mount the spoke magnet and align it to the edge of the Badass Box housing. That's it!

BadassBox 4 for Bosch - The most important information at a glance:

-25 km/h speed limit of Bosch motors is completely removed.

-Contactless e-bike tuning.

-Patented snap lock enables quick attachment and removal of the box.

-Badass box attached & spoke magnet moved: Tuning activated - the 25 km/h speed limit is lifted.

-Badass box removed and spoke magnet moved back to original position: Tuning cancelled - motor assistance stops again at 25 km/h.

-Replaceable 1.5V AAA battery (IEC R03) with high range, among other things due to patented field amplification technology.

-Thanks to potting compound from the automotive industry, the Badass Box 4 is very robust and well protected against moisture.

-Double quality control (before and after potting).

-Dimensions: 61 x 43 x 15 mm

-Weight: Badass Box 27g (with battery 37g)

-Developed and manufactured in Germany.

Badass Box 4 for Bosch X-Set - Compatibility

E-bikes with Bosch sensor integrated in the dropout, powered by one of the following Bosch mid-mounted motors:

Active Line, Performance Line, CX Line & Active Line Plus.

Also compatible with Bosch e-bike middle motors of the 4th generation (year 2020/2021).

Not compatible with Bosch Smart System 2022!

Important notice - please note:

You only need this "Badass Box 4 Bosch X-Set" if this Bosch sensor is integrated in the dropout of your e-bike:

If the sensor integrated in the dropout has the shape of the second sensor (next fig.), then it is the so-called G4 Speed Sensor, which is used e.g. on Trek e-bikes. In this case, you need the "Badass Box 4 for Bosch G4 Set".

If the Bosch sensor of your e-bike is easily accessible on the chain stay, you only need the usual "Badass Box 4 for Bosch e-bike motors".

Badass Box 4 for Bosch X-Set - Scope of delivery

1x Badass Box 4 for Bosch

1x Badass Box 4 housing cover

1x AAA battery

1x spoke magnet with lobe screw

1x Universal adapter

1x Elastic foam pad

1x M5 nut

1x washer

1x cheese head screw

4x cable tie

Tip: Bosch Smart System e-bikes (BES3) can be easily recognised by the charging cable plug, among other things.

SQUARE plug = Bosch Smart System BES3 (Gen4) + Bosch Gen5:

ROUND plug = Bosch Gen2, Gen3 & Gen4:

If your Bosch e-bike charging cable has a round plug (as shown above), you have selected the correct tuning module (provided the bike does not have ABS). If your Bosch e-bike does not have either connector, you either do NOT have a Bosch e-bike or an e-bike with the old Gen1 drive (Classic Line).