自転車競走路.
a competitor (in a race)―a runner
a motor race called {safari race}
a high-hurdle race
a 100-yard race
I raced with a motor-car.
a motorcycle race called {scramble race}
A Garbage-Powered Motorcycle
the goal―the winning-post
a campaign in the United States promoting the use of bicycles as a means of reducing the amount of pollutants in the air, called bicology
a non-mobile bicycle that lacks a rear wheel, used for toning one's body