Abstract: A motorized tricycle for deliveries, comprises a load carrying box on the rear of the tricycle between the two rear wheels of the tricycle and extending down below the axis of those wheels. The rear wheels are supported from a crosspiece of the frame of the tricycle which is forward of the box, and the support members extend below the box between the wheels for supporting the box. One of the rear wheels can be driven and in fact can be part of a conventional two-wheeled motorcycle unit with the front wheel removed. The crank of this motorcycle unit can be connected to the pedals of the tricycle. The box is releasably locked in place on its support.