When I open the box and saw all of those nuts and bolts......I became a little nervous. BUT....I ended up putting the bike together all by myself....I had a little help from my son hooking up the electronic parts. The bike runs so smoothly....no noise at all. I ride in the evening after work for about 45 minutes. I think I'll try a small pillow in my back tonight for a little more support. For the price....it's a wonderful bike. I've had the bike for six days......a birthday present from my parents.