BADASSBOX for TREK Bikes

Where is your sensor?

The speed sensor and its positioning are decisive for which badass box you need.

We distinguish between the classic mounting on the chain stay and the integrated mounting in the area of the dropout.

Sensor on the chain stay

A good indication that your sensor is on the chain stay is the presence of a spoke magnet.
In addition, the sensor is usually direct and easily visible.

Bosch Classic Sensor

If this sensor of the Bosch motor - as shown in the picture below - is located on the chainstay of your Trek bike, then the badassBox 4 Bosch is just right for you.

Sensor in the area of the dropout

If the sensor is integrated, then you do not have a spoke magnet, but instead a magnet on the brake disc.
To get a good view of the sensor, it is recommended to remove the rear wheel.

Slim Sensor

If this sensor of your Bosch, Fazua or TQ motor - as you can see in the picture below - is integrated on your Trek bike, then the badassBox 4 Bosch Slim-Set is just right for you.

G4 Sensor

You need our badassBox 4 Bosch G4-Set if this small sensor is integrated into the dropout on your bike.