The GIANT EXPRESSWAY is a lightweight folding bicycle with an aluminum frame. It has 20″ wheels and rides very smoothly. It can be folded to take on a train or put in a car but it is large enough to handle very well. We use a special 20″ conversion kit with a seat pole mounted Samsung lithium ion battery (36V 9Ah). The electric motor has lots of torque at low speeds because of the small rim size so it will pull you up any hill. This bicycle is extremely zippy and will ride far better than any production line folding bicycle due to the light weight quality bicycle and electric components.