Rail wheel is a kind of wheel specially intended for use on rail tracks. A moving segment is regularly squeezed onto a rail axle and mounted indirectly on a bogie or train. Wheels are having particular hardness with the respective ratio of pressure. New wheels are trued, utilizing a machine, to a particular profile before being placed onto an axle by pressing them. Train wheels have a flange on one side to keep the wheels, and consequently the train, running on the rails.  Some wheels have the cylindrical shaped geometry, where flanges are fundamental to keep the train on the rail track. The flanges available in wheel of rail should not touch the rails; it is only a last option to prevent the wheels by getting derailed. Rail wheel arrangement is a configuration of ordering the path in which wheels are segregated under a locomotive. Several documentations exist to elaborate the wheel assemblies of a train by sort, position, and associations, with the received documentations assigning by the nation. Standard wheel assemblies that are made of steel and flexible compound can weigh up approximately between 235 to 480 pounds. The comparatively light-weight assemblies have a normal load limit of nearly 10,000 pounds, while the heavier ones have a limit of around 40,000 pounds.

On curved track, the external wheel has a more distance to cover than the internal wheel. To make up for this, the wheel set moves sideways in connection to the track so that the bigger wheel span on the internal edge of the wheel is utilized on the external rail of the curve. The inner wheel utilizes the outer edge of its wheel to reduce the covering distance during curve passage area. One such report on rail wheel market shows details about railroad wheels are created in diameters ranging from 650mm to 1250mm. Mostly rail wheels have a cone-shaped geometry, which is the essential method for keeping the train's movement adjusted to the track.