How many gears does a speedway bike have?

Motorcycle speedway, usually referred to as speedway, is a motorcycle sport involving four and sometimes up to six riders competing over four anti-clockwise laps of an oval circuit. The motorcycles are specialist machines which use only one gear and have no brakes; racing takes place on a flat oval track usually consisting of dirt, loosely packed shale, or dolomite (mostly used in Australia and New Zealand). Competitors use this surface to slide their machines sideways, powersliding or broadsiding into the bends. On the straight sections of the track the motorcycles reach speeds of up to 70 miles per hour (110 km/h).

The exact origins of the sport are unknown but there is evidence of a type of speedway racing being practised in the USA before the First World War and in Australia in the late 1910s and early 1920s. There are now both domestic and international competitions in a number of countries including the Speedway World Cup whilst the highest overall scoring individual in the Speedway Grand Prix events is pronounced the world champion. Speedway is popular in central and northern Europe and to a lesser extent in Australia and North America. A variant of track racing, speedway is administered internationally by the Fédération Internationale de Motocyclisme (FIM). Domestic speedway events are regulated by FIM affiliated national motor sport federations.