Some tricycles, such as cycle rickshaws for passenger transport and freight trikes, are used for commercial purposes, especially in the developing world, particularly Africa and Asia.
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A crank arm which is hinged on the vehicle frame is hinged with a crank through a coupled rod, the crank is fixedly installed on the back crankshaft, and a vehicle shaft and a front fork are provided with animal capitiform through a supporting arm. Urban delivery trikes are designed and constructed for transporting large loads. Some allow the "captain" the rider who steers and "stoker" the rider who only pedals to pedal at different speeds. Electric Juggernaut 3 wheel trike 4. Children's rear-drive trikes lack a differential, so one rear wheel spins free. Freight bicycle and Workbike.