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badassBox Typ3.4 Kalkhoff-Impulse and EVO

It simply works!

The badassBox makes your e-bike much quicker in no time at all, mounted in just moments. Back on public roads, the badassBox can be removed in seconds. Your e-bike is once again legally in compliance with the regular speed limits.

You read ‘25’ – and drive 50!

Don’t be surprised at your speedometer: When your e-bike is travelling at 50 km/h with a mounted badassBox, the speed displayed is only 25 km/h. Find out below why that is the case.

The badassBox Type3.4 Kalkhoff is compatible with all Kalkhoff mid-mounted motors of the Impulse, Impulse Evo, Evo RS and Impulse 2.0 versions as per 04-2016.

See for yourself: Your badassBox makes your eBike take off in a flash!

Scope of delivery

badassBox Kalkhoff/Impulse – version 3.4 with battery and cover, O-ring, Tool free 4mm

Available immediately. Shipping within 1 - 2 business days.
incl. statutory VAT 19% plus shipping costs
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This is how the badassBox works:

The badassBox reduces the speed of the motor system by half from a speed of approx. 18km/h (depending on the circumference of the wheel). It makes no difference to the motor whether it performs at full power in the lowest or highest gear. The badassBox does not affect the maximum performance. The drive limit for Pedelecs is moved to over 50km/h.

The badassBox is powered by photo battery cells (type CR2) enabling it to perform over approx. 6000 km or one year (discharged battery) thanks to low power technology. As the signal transmission takes place without an electrical contact (contactless chip tuning) electrical damage is physically impossible. A microprocessor switches on and off automatically. The battery is replaced simply by opening the base of the housing.

Sound and reliable

The badassBox Type3.4 is the fourth generation since the successful introduction of the Type3 in 2013 - and it has been continually improved since then: The housing has been strengthened, the electronics enhanced and the firmware has been adapted to the current motors of a variety of manufacturers. The current badassBox Type3.4 is now also splash proof and less sensitive to vibrations and bumps. These are only a few of many improvements that make the badassBox very reliable.

The badassBox is a quality product - every single device is inspected many times during production. Attention: The badassBox is only guaranteed to be genuine only with the seal on the base of the housing!

Not satisfied? Get your money back!

We want you to be satisfied with the badassBox. At all times. Should this not be the case then please send us a mail to service@badassebikes.com or make use of our service form in the menu. We normally solve the problem on the same day.

All spare parts from the Type3.3 model onwards are held in stock to ensure that you enjoy our product for a long time. However, should you be dissatisfied with the badassBox within the first 3 months of the purchase then we will reimburse you the purchase price. Immediately and no questions asked.


  • Mount the badassBox via the speed sensor.
  • Secure the badassBox using the O-ring at the sensor.
  • Exchange the cross slot screw at the magnet with the clamping screw enclosed when used for the first time. For future use you won’t need tools to relocate the magnet!
  • Relocate magnet, (see video) unchanged since Type3.3. Unscrew – relocate – screw together. Done.


Please ensure there’s at least 15mm space between sensor and spokes. If it’s less, add this adaptor plate to your order.


  • Release the badassBox O-ring.
  • Remove the badassBox.
  • Relocate magnet to the original position.

Technical data:

Length: 54mm
Height: 42mm
Width: 22mm
Weight: 64 g including battery
Special feature: splash proof battery case, coated electronics. Also works under water.

After installation of the badassBox the magnet must be offset. The video shows this easy operation.

ATTENTION: First time use, please exchange the Phillips screw of the magnet against the badassBox provided toolfree screw. Then the displacement of the magnet is possible without requiring any tools.

Accessories & replacement parts
Universal mount Universal mount € 5,90
incl. statutory VAT 19% plus
shipping costs
O-Ring O-Ring € 1,10
incl. statutory VAT 19% plus
shipping costs
Tool free 4mm Tool free 4mm € 1,20
incl. statutory VAT 19% plus
shipping costs


  • The badassBox is not to be used in normal road traffic or in areas regulated by the Road Traffic Act!
  • Use is only permitted on private property or for example for competition or test purposes.
  • Mounting the badassBox may lead to a loss of the bicycle warranty.
  • Use of the badassBox is entirely at your own risk and danger.
  • The manufacturer accepts no liability for damage to property and/or persons arising from inappropriate use of the product.
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