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A four wheeled cycle including a frame, a load carrying base, two front wheels, two rear wheels, a steering mechanism, a brake mechanism, a pedal mechanism, a chain drive mechanism, and a saddle unit. The frame is a retractable frame, including a rear support frame, a down tube, a transverse tube, and at least two telescopic casing tube assemblies that are arranged side by side. Each of the telescopic casing tube assemblies includes a front casing tube, a middle rod, and a rear casing tube. The load carrying base includes a cross bar, a front connecting rod, a left connecting rod, a right connecting rod, a rear connecting rod and internally hinged bars for linking the connecting rods. The two front wheels are respectively connected to two ends of the cross bar through a bearing at the top ends of a front fork.