Otherwise, everything is super, easy to assemble, it can't even be called an assembly. . Everything is assembled at the factory. 1. you need to screw the steering wheel; 2. you need to screw the front wheel; 3 you need to screw the saddle. All! This is the whole assembly. All cables are already in place, the chain is in place. When assembling, you will need two hexagons (5 and 6) and a key for 14 (for the saddle and pedals) keys are not included.