Editing O scale (section)

====Gauge====
''Gauge'' refers to the distance between the inside edges of the load-bearing rails. Various sizes of [[track gauge]] exist around the world and the normal O gauge track represents the [[Standard gauge]] of {{Track gauge|1435 mm}}. "O gauge" refers to tracks that are nominal {{Track gauge|32mm}} according to older standards of NMRA, current standards of BRMSB and NEM. {{Track gauge|1.25 in}} apart current standards of NMRA.<ref name="What is O Gauge"/> When used as a [[narrow-gauge]] track, O gauge allows scales such as 1:32 representing {{Track gauge|1000 mm}} gauge track. 1:20 representing {{Track gauge|600 mm}} [[narrow-gauge railway]]s.

Regional model manufacturers design their O-scale rolling stock with minor regional scale differences—manufacturers support their rolling stock with track made to the same regional scales, so there is no universal width for O-gauge model track.{{Citation needed|date=April 2010}} Models could represent the real-world standard gauge track spacing of {{Track gauge|1435 mm|disp=1}} by choosing various spacings such as {{Track gauge|30 mm}} at 1:48 scale, {{Track gauge|1.25 in}} at 1:45.2 scale, {{Track gauge|32 mm}} at 1:44.8 scale, {{Track gauge|32.96 mm}} at 7&nbsp;mm:1&nbsp;ft scale, and {{Track gauge|33 mm}} at 1:43.5 scale. Model makers choose their scale based on many considerations including the existing marketplace, aesthetic concerns and compatibility with existing models.