Technically, yes, fitting a third-party motor kit is possible, but strictly subject to the following conditions: • Motor torque limited to a maximum of 50 Nm: The internal gears of the Shimano Nexus hub are not designed to withstand the high torque of a powerful electric motor (exceeding 50 Nm risks causing irreparable damage to the hub). • Safety and certification: The non-electric Kombi Nexus was designed, tested and certified in accordance with the EN 17860-2 cargo standard. Installing a third-party kit must be carried out by a qualified professional to ensure the safety and compliance of both the brakes and the wiring harness. 💡 The 100% peace-of-mind solution: If you are looking for a turnkey electric cargo bike, check out our Kombi EP5! Factory-fitted with a powerful Shimano motor and calibrated hydraulic brakes, it will take you anywhere without requiring any mechanical modifications.