@GGG posted:Not uncommon for older ones to have cracks. If you go metal I would look at how it may short going across switches. I believe they maybe plastic for a reason beyond cost savings. G
GGG,
That’s my concern. I picked up Lionel flangeless metal traction wheels. I’ll either cut the O.D. undersize and press a plastic collar (tire) on the wheel or just put a rubber drive tire on the existing grove but I fear the raised edges might contact the rail.