Question about track size

Classic Toy Trains Forum
1

I have some 72, 54, some that measures a 27 inch circle, and the 42’s are available locally here, but I see ads for 31’s. Are there 31’s and 27’s? Thanks, Jake

2

yes there are 31 (O) and 27 (O-27).

I don’t remember all the different curves that are available for the different gauges, but 31 is heavier gauge steel than O-27.

3

Thanks much, Jake