bellymoondrop posted:So, does "Scale" mean 2 rail, Two rail is distinguished by the smaller flanges on the wheels and the couplers. The track itself is two vs three rail.
"O" gauge? This describes the spacing of the rails.
"Scale" describes accurate size as 1:48. In order to allow trains to run on smaller curves, dimensions are frequently compressed. This is referred to as "Traditional" sized vs "Scale".