The Suessian Pedal Tractor: The Suessian Pedal Tractor is a three-person mutant tricycle that was built for kinetic sculpture racing. It does not have tires on the rear wheels. It has shoes. I built it mostly out of recycled steel, scrap from my shop, and old bicycle parts. There are two seats, side-by-side in between the big wheels, each rider has a set of bicycle pedals. The front rider pedals and steers. It weighs about 250 pounds.