The bikes stay upright because the tires fit snugly between the wooden slats. This DIY bike rack by @hamsterwheelbikerepair is made with just wood and screws! The diagonal pieces hold the bike tires.

But why settle for less? Creating your own DIY swiveling bike rack is not only cost-effective but surprisingly simple. Read more: Make Appliance Cords Less Of An Eyesore With One Clever Solution ...