Welcome to the forum. If you want a small solid bike consider the CarryMe, small wheeled motorbikes in ports are very common because of the small size, this is a similar concept, I only just started commuting on it (8km) in the rough London streets and I average about 24km/h hitting a max of 36km/h

More info:
http://www.pacific-cycles.com/produc...?cat1=1&cat2=7