In railroad usage the conical running surface of the wheels may be called a rim or a tyre.
Read more about this topic: Rim (wheel)
Other articles related to "railroad usage":
... The term also applied to the walkways on top of railroad boxcars ... Originally, they were used by brakemen to travel from car to car to apply hand-operated brakes ...
Famous quotes containing the words usage and/or railroad:
“I am using it [the word perceive] here in such a way that to say of an object that it is perceived does not entail saying that it exists in any sense at all. And this is a perfectly correct and familiar usage of the word.”
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