Probably, I'm pulling this all from memory, I'm setting up a layout this summer, and the last time I've seen all these old cars was 1999 roughly. And we have a little New York Central 2-6-2, which takes 18", even a few 15" curves, if my memory serves me correctly. Its actually a perfect little engine.............And the diesels I own, have no trouble getting around 18", they are just classic Bachmann 4-axle Union Pacific Diesels. I was going to buy some 22" track this summer, but our local hobby store is going out of business, and instead of track I snagged a Bachmann Spectrum J-class brand new, with auxilary tender for $99.99.......I just couldn't resist an engine being marked down $70 dollars. If I was allowed I was going to buy the Arthean Genesis Big Boy they had marked down to $259.....even if I couldn't really run it...Could you imagine that on a 18"