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Quadrilateral

Image  Quadrilateral-a Quadrilateral-b Quadrilateral-c Quadrilateral-d
Category Bicycles
Title of Entry Quadrilateral
Country China
Designer Li Yin
Description Quadrilateral has a new folding structure with less welding points than the other folding bikes; the various parts of the frame use hinge connections with bearings that allow for quick folding and unfolding.

Those folding bike is for two groups of people: those who have cars can ride the bike between their parking spot and destinations; those who use public transportation to go to work can ride between the transportation stops and their places of employment.