Harness racing use a standing start. The sulky (informally known as a "bike") is a light, two-wheeled cart equipped with bicycle wheels. The driver (not a "jockey", as in thoroughbred racing) carries a light whip chiefly used to signal the horse by tapping and to make noise by striking the sulky shaft. There are strict rules as to how and how much the whip may be used; in some jurisdictions (like Norway), whips are forbidden. For exercising or training, the drivers use what is known as a "jog cart," which is a sulky that is heavier and bulkier than a racing unit.
Harness racing front and right hind together, then left front and left hind). In continental Europe, races are conducted exclusively among trotters, whereas in Australia, Canada, New Zealand, the United Kingdom and the United States races are also held for pacers. Pacing races constitute 80% to 90% of the harness races conducted in North America. Pacing horses are faster and (most important to the bettor) less likely to break stride (a horse which starts to gallop must be slowed down and taken to the outside until it resumes trotting or pacing). One of the reasons pacers are less likely to break stride