"Harness racing is a form of horse racing in which the horses race at a specific gait (a trot or a pace). They usually pull a ...
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two-wheeled cart called a sulky, or spider, occupied by a driver. In Europe, and less frequently in Australia and New Zealand, races with jockeys riding directly on saddled trotters (trot monté in French) are also conducted." - (en.wikipedia.org 02.03.2020)