MTH uses driver diameters when referencing tire sizes. Lionel's numbers are for the actual tire before its installed on the wheel. Look up your engine at lionelsupport.com and you will see the dimensions of the tire that came with your engine. Its virtually identical to the one shown above. When stretched onto the wheel the diameter will increase and the width and thickness will decrease.
If you want to use MTH tires, measure your wheels, convert to metric, then see if MTH has anything close, you will likely have to try a few different sizes to find something close.
Prte
