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 saddle a two-wheeled vehicle, also supports part of the vehicle's weight. In addition, it offers a base for fittings such as terrets and a point of attachment for a bearing rein. A harness saddle is normally used on the horses next to the vehicle (in a team, the "wheelers"). It may also be used for show on leaders in a team. The saddle is held in position by a girth strapped firmly around the heartgirth area of the horse. When traces are used, a back band runs through the saddle, joining at the sides to a loose strap under the belly,