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E-bike tuning - for e-bikes/pedelecs with IMPULSE motor


IMPULSE - In 2011, the IMPULSE mid-engine was ahead of its time and Derby Cycle was able to maintain its market dominance for many years. But by 2019, the market had rapidly evolved and changed. Derby Cycle announced that no more IMPULSE motors would be built. However, hundreds of thousands of IMPULSE drives are still in use on German and European roads, so tuning manufacturers never tire of producing new modules.


The name of the motor manufacturer is usually on the casing of the drive or in the enclosed data sheet. In 2011, the IMPULSE mid-motor 1.0 was a real novelty, because it came on the market with a coaster brake. A small sensation. In 2014, the further development 2.0 appeared, with further models to follow. The drive was used on e-bikes from the major Derby Cycle brand: Raleigh, Kalkhoff, Gazelle and others. The IMPULSE EVO was even more powerful and even supported S-pedelecs with a speed of 45 km/h. This was also true for the IMPULSE EVO RS. The last model was the IMPULSE EVO NEXT from 2017. The list shows for which motors SIP Scootershop offers tuning modules:

The following list shows you which modules we at SIP Scootershop offer for IMPULSE motors:

The manufacturer from the Czech Republic has gained experience in the production of tuning chips since 2014. Its modules are installed directly on the engine and are suitable for some IMPULSE engines. The SpeedBox 1 is not visible from the outside.

E-bike and pedelec tuning from Lower Franconia. The so-called Badass Box is not installed on the motor, but simply attached from the outside and works with all IMPULSE motors. Version 4 is the latest model and offers a range of over 7,000 kilometres.


At SIP Scootershop we offer the following tuning modules for IMPULSE engines:

These small boxes are plugged onto the sensor of the bike or pedelec and now this tool halves the transmitted speed, doubling the motor support. It is a wireless device that can be removed again in no time. The manufacturer Badass is the market leader here.

These modules contain a chip and cables with connectors. They are installed invisibly under the engine cover and clamped between the sensor and the control unit. Many modules can even be switched on or off via the display while driving. The latest modules, such as the Speedbox B, also have integrated app control via Bluetooth. The control and also the reading of the motor data can be done with the smartphone. However, tools are required for installation and removal. In the following, we will go into more detail about these modules.

The motors are controlled by a speed pulse that tells them how fast a pedelec or e-bike is travelling. If the pulse reaches 25 km/h, the motor switches off. However, if only every second signal of the impulse comes through, 50 km/h can be reached, because the motor is "fooled" into thinking it is travelling at a different speed. With cheap modules, the speedometer then simply displays half the speed.

More sophisticated chips are more advanced: they halve the impulse only from 23 km/h or, in some drives, they are directly connected to the data transmission between sensor and motor, so that the speedometer always shows the correct values. The most modern tuning modules, for example from VOLspeed or Speedbox, even display the total kilometres driven and average speeds correctly.

However, the software version of the bike and pedelec must also be kept in mind. A carelessly installed update from the manufacturer can abruptly end the tuning pleasure. Be careful, because the motor manufacturers and tuning experts are constantly playing a cat-and-mouse game.

Want to know more about e-bike tuning?

Here you will find all the information you need on the subject: Finding the right tuning module.


It should be noted that the operation of this type of modified electric bicycle on public roads may be against the law in some countries. The dealer accepts no responsibility for any damage caused by the use of tuning products. Electric bicycles equipped with tuning products must not be used on public roads, cycle paths and squares. Electric bicycles equipped with tuning products may only be used on private property and at your own risk.