Learn how to say Tricyclist correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word tricycle:
a vehicle similar to a bicycle, but having three wheels, two at the back and one at the front.
a three-wheeled motor vehicle for a disabled driver.
[no object] (often as noun tricycling)
ride on a tricycle:
between 1876 and 1892 tricycling attracted thousands of adherents