The Impulse E Bike system was developed by the German company Derby Cycle AG. This system was a real innovation, because the Impulse E Bike mid-mounted engine was the first one that could be combined with a back pedal brake. Here you can find high quality tuning tools to derestrict Impulse electric bikes. These amazing and easy-to-use devices take away the 15 mph (25 km/h) speed limit, thereby allowing you to reach much higher speeds with the motor power still assisting. Of course, you can undo the tuning process whenever you want to.