I like wise bought a diesel that was rated for O54. Put it on a make shift track I had on the floor which I was playing with granddaughter on.
After a few test laps the traction tire came off. Replaced it came off again. Then it dawned on me that I was running on O-36 curves. No problem on O-60.
That's my story and I'm sticking to it.!
Regards,
Mike