A sulky is a lightweight cart with two wheels and a seat for the driver, generally pulled by horses or dogs. With horses, a sulky is used for harness racing. The term is also used for an arch-mounted cart on wheels or crawler tracks, used in logging, or other types of vehicle having wheels and usually a seat for the driver, such as a plough, lister or cultivator. Horse sulky A sulky for horses is a lightweight two-wheeled, single-seat cart that is used as a form of rural transport in many parts of the world. A special development of this is now used in most forms of harness racing in Argentina, Australia, Canada, France, the United States and New Zealand, including both trotting and pacing races. They are reputedly called "sulkies" because the driver must prefer to be alone. Race sulkies come in two categories, Traditional symmetrical sulkies Asymmetric or "offset" sulkies An "improved sulky" with pneumatic tires and adjustable height was patented at the United States Patent Office by W.J. Hamill on August 15, 1893. (see Google patents) The asymmetric sulky was patented in Australia in the 1980s and came to prominence in 1987 when a two-year-old gelding named Rowleyalla used one to break the then world record for his category, at 3.4 seconds under the existing mark. In 1990 the asymmetric sulky was introduced into North America, winning seven of its first nine starts at Freehold, NJ. Today the great majority of sulky manufacturers in North America are producing asymmetric sulkies. An additional sulky type is the "team-to-pole" or "pairs" sulky, a lightweight single seat sulky designed for draft by two horses abreast. These may also be split into two types: Traditional pole and yoke with draft by traces. Dorsal hitch with draft direct from the saddle to the yoke and, via the pole, to the sulky. Of the two, the dorsal hitch pairs sulky is the most recent, holding all current world pairs speed records over the mile to July 31, 2005. Sulkies used in harness racing There are two types of sulkies used in harness racing. Jog Carts, used only for training, are bigger and bulkier than a racing cart. These may sometimes be known as Roadcarts. The shafts may be wood, aluminum, steel or stainless steel. They have bigger seats which requires less athleticism to sit upon, and may also seat two. The most modern