I recently acquired a Delton log car that looks great with my Bachmann log cars. I want to replace the plastic wheels with Bachmann metal wheels. Which size do I need--the 24.5mm or 31mm? How is the diameter measured--to the tip of the flange of the rail face surface?
The 31mm wheels will be the ones you want if you're looking for a close rplacement. Diameter does not include the flange.
Later,
K