It conveyed patrons, horses, trainers, sulkies and jockeys. There are two types of sulkies used in harness racing. It runs live harness races, in which horses pull two-wheeled carts called sulkies. Customers could choose from Studebaker sulkies, broughams, clarences, phaetons, runabouts, victorias, and tandems. Show vehicles are usually carriages, carts, or buggies and, occasionally, sulkies or wagons. But in recent years lightweight, single shaft, independent suspension, driving sulkies have been introduced. Today the great majority of sulky manufacturers in North America are producing asymmetric sulkies. Smaller sulkies are also used for dogs, both for racing and as transportation. They are reputedly called "sulkies" because the driver must prefer to be alone.