No, train wheels are not called bogies; rather, a "bogie" (in the UK and India) or a "truck" (in North America) is the entire structural assembly located underneath a train car to which the wheels and axles are attached. A standard bogie typically consists of a frame, a suspension system (springs), a braking system, and two or more wheelsets (axles and wheels). Most modern train carriages have two bogies—one at each end—that can swivel independently to help the train navigate curves smoothly. The wheels themselves are typically made of high-quality steel and have a "flange" (a protruding edge) on the inside to keep the train on the tracks. So, while you might hear people refer to the "wheels and bogies" together, the bogie is the complex "chassis" or "under-carriage" that holds the wheels in place and provides the ride comfort. In some regions, like India, the word "bogie" is colloquially used to refer to the entire railway carriage itself, though this is technically incorrect in engineering terms.