Italian designer Gianluca Sada came up with a prototype for a bicycle that is hubless and can fold up to the size of an umbrella. According to Sada, “It uses a system anchoring the wheels using smaller wheels held by a small frame and a specific quick clamping device. They allow you to fold the bike quickly and easily, using its special package like a trendy backpack.” There are still issues to be worked out. Sada had to strengthen the rim to make up for the missing spokes, which added a lot of weight to the wheels. This makes it harder to accelerate the bicycle. If he can solve that problem, it’ll be a good marriage of form and function.