RACER

[noun] [C]A racer is a person or thing that races.Three racers finished with almost exactly the same time.In a high-speed crash, a downhill racer has about a 50% chance of injury.This car is a custom-built (= made for a particular person) racer.A racer (also racing bike) is a bicycle designed for speed with a light frame and handlebars which curve downwards.