Carrying a bicycle onto a bus or subway for unrideable sections of your carless commute is less than convenient. This is where the Sada Bike fits in. Whereas other foldable bikes have shrunken frames and wheels, the Sada Bike’s full-sized frame folds down to the size of an umbrella; its spokeless, hubless, 26-inch wheels double as a backpack frame. Italian engineer Gianluca Sada has built a prototype, and its innovative design could bring us a few steps closer to a stylish, utterly practical, low-carbon urban ride.

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