I have a williams steam 4-8-4 for which neither williams, MTH or Lionel tire has a replacement tire width is the problem 2mm
at first I used shoe goo which is almost like RTV, had to remove it as it was hard to apply and became bumpy and hung up on the other wheels. So I tried Liquid electrical tape with an appliclator brush. I turned the locomotive and attached power to the rollers and set the speed as to just roll the wheels. I then applied the Liquid electrical tape with the brush (acid brush) and left the wheels spinning for 20 min or so. then waited 24 hours to use. works fine great coefficient for pulling
