All I had to do was put together the handle bar, bike pedal, front headlight, front mud flap, and attach the front wheel because the bike arrived 85 percent prebuilt out of the box. Bike pedals are simply screwed on and tightened using the wrench provided. To tighten the level of the headlights, use the provided allen wrench and philip head to screw in the front headlamp and mud flap. All of the gear is mounted to the handle bar all you have to do now is place the collar into the bike column. Installing the front wheel was simple: tighten the nuts on the detached wheel, remove the anchor nut from the bike, insert the front wheel, secure the quick release, and the wheel should rotate freely.