Sulky pullers, also known as pacers, are horse-drawn vehicles used for harness racing. They are typically pulled by a single horse and driven by a driver who sits on a sulky, or two-wheeled cart. The sulky pullers are used to pull the horses around the track at high speeds. The pacers are usually bred for speed and agility, and they are trained to respond quickly to the driver's commands. The pacers are also used in showmanship classes, where they are judged on their ability to perform certain maneuvers.