The original plastic tires dried out and crumbled away. I modeled the wheels in Tinkercad as 'holes' (subtractive volumes), added cylinders to size the tire to the target wheel, then added a tread found here on Thingiverse.
TPU filament recommended. I was able to get a snug fit without the need for additional adhesive.
The tread width is 25mm. Internal diameter is 36.5mm. External diameter with tread is 43mm.
You can find and edit the model to fit your wheel here on Tinkercad https://www.tinkercad.com/things/9Qby6bNWVZV