Michael Ubbesen Jakobsen wants you to know that squares can roll. His geometric new BauBike is a Bauhaus ride built around squares and equilateral triangles. The wacky bike is stripped and utilitarian, made with simple clean lines and raw materials. The main body tube is open above the rear wheel, allowing owners to customize and accessorize the bike as they see feet. Jakobsen built the bike with a series of strict design rules that limited the frame geometry to straight lines that followed a pattern of 60 and 90-degree angles that follow the principle of the golden ratio. [via yatzer]