Axle track

The axle track in automobiles and other wheeled vehicles which have two or more wheels on an axle, is the distance between the centerline of two roadwheels on the same axle. In a case of the axle with dual wheels, the centerline in the middle of the dual wheel is used for the axle track specification.

Track (measured between center line of wheels)

In a vehicle with two axles, this is expressed as "front track" and "rear track".

However, the front wheels and/or rear wheels on either side of a vehicle do not necessarily have to be mounted on the same axle for the distance that they are apart to be called the "track".[1]

Rail

In the case of a rail wheelset the "track" is called "wheel gauge" and is measured from wheel flange reference line to wheel flange reference line on the wheels of any rail car or tram.[1]

gollark: Also public with some sort of warning.
gollark: Maybe the extra-channel thing could work better if it was a general "debating" one and significantly more strictly moderated in other ways.
gollark: It doesn't solve it completely. It introduces extra issues which you seem to be ignoring.
gollark: Well, an isolated channel instead of my idea of a switchable "flag" on this one would have the issues I've mentioned.
gollark: You've solved *some* of the issue, and I'm not convinced that this actually happens much now.

See also

References
  1. wheel-gauge
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