Question: What’s with these derestricting dongles I see around? Should I do this to my ebike for better performance? – Bryson, Park City UT
Answer: Derestricting an electric bike refers to the process of modifying or removing the limitations imposed on the bike’s electric-assist system, allowing it to exceed the standard speed or power limits set by regulations. E-bikes are equipped with an electric motor that assists the rider’s pedaling, providing an extra boost to their speed and making it easier to tackle hills and other challenging terrains.
However, many countries have specific regulations that dictate the maximum power output and maximum assisted speed of e-bikes in order to classify them differently from motorcycles or scooters. These regulations are put in place for safety and legal reasons, as different vehicle categories have different requirements for licensing, registration, and safety equipment.
Derestricting an e-bike can involve various modifications, such as:
Removing Speed Limiters: Many e-bikes are electronically limited to a certain maximum speed, often around 25 kph (EU) or 20 mph (US) to comply with local regulations. Derestricting involves removing or altering this limiter, allowing the e-bike to achieve higher speeds.
Increasing Power Output: Some e-bikes have their power output limited to a certain wattage. Derestricting might involve modifying the motor or controller to allow the e-bike to provide more power to the wheels.
Tuning Changes: E-bike systems often have programmable settings that control the level of assistance and other parameters. Derestricting can involve reprogramming these settings to provide higher levels of assistance and power.
Aftermarket Kits: There are aftermarket kits available that can be installed on e-bikes to derestrict them. These kits might include modified controllers, dongles, tuning boxes and other components to bypass or override the restrictions.
It’s important to note that derestricting an e-bike might have legal implications and safety concerns. In many jurisdictions, derestricting an e-bike to exceed legal speed can result in the e-bike being classified as a different vehicle category (such as a motorcycle), requiring proper licensing, registration, and insurance. This can lead to fines and legal troubles. That’s why you typically see disclaimers such as “for off public road use” or “for use on private land only” on the dongle kits.