When developing Avial Bikes prototypes for, the CAD simulation is used with a safety factor of 2, which is carried out by our order by the engineering center specialists. In the course of static and dynamic tests, we refine the components and units, and then we manufacture the prototype frame using hybrid glue-rivet technology. The assembled Avial e-Bike is going to road tests for 5,000km (3,100miles) with a payload of 120kg (265lbs) both on city streets and off-road. Then we disassemble the bike and conduct a detailed analysis of the frame elements. If no damage is found, then we assemble a new one and send it for certification according to ISO and EN.