First, during assembly, there was one bolt with a nut for fixing the reflector, but oh well. The second thing is that the guys will have to take a bicycle to a specialist or catch up with the whole thing on their own . . I did it myself, I probably spent about 6 hours. No brakes, no shifting. I had to set everything up myself. Okay, there is an Internet to help. Without a good set of keys, there is even nothing to climb.