At what dimensions are wheels considered out of gage?

Wheels are considered out of gage when they exceed the specified limits for acceptable dimensional tolerances. In the context of rail mechanics, the standard gage for wheels is typically 52 inches to 53 inches. The correct choice reflects that wheels that measure less than 52 inches and 15/16 or greater than 53 inches and 3/16 are outside of the acceptable range.

This choice accurately identifies the critical thresholds beyond which wheels no longer conform to the established safety and operational standards required for efficient railroad functioning. Proper wheel dimension is essential, as it significantly impacts train stability, safety, and the ability to navigate tracks. Deviations from these measurements can lead to derailments, increased wear and tear on rolling stock, and other operational hazards.

Establishing these specific thresholds is crucial within the rail industry, as maintaining proper wheel gage is a key aspect of ensuring safe and effective rail transport. The other options either present a single measurement or do not sufficiently encapsulate the necessary dimensional tolerance, making them inadequate for identifying wheels that are out of gage.