When it comes to O gauge trains, I don’t know if there’s a more confusing topic than track dimensions. Standards, schmandards. Let’s see what I can do to de-mystify O gauge curved track dimensions.
O gauge track comes in some common dimensions, the most common being 31, 36, 42, 54, 72, and 96 inch diameters. The problem is not every track system has each diameter, and the measurements tend to be nominal, kind of like lumber.







