here is a set of Vintage Louis Marx  1-7/8"Toy Truck Or Car Tires 7/16" wide 3/16" bore. I believe these to be new old stock, they show no wear, I got them in a box, I think somebody worked at the marx Factory, or was at a sale when they closed or something. These were dirty, i rinsed them off but , as you can see, you can still clean them up more, I am offering you a full set of 4, I will be happy to combine shipping, I will also have a few different sets of wheels, happy to combine shipping on about anything I have.. I am sure with a little cleaning and dressing they will look like new. and they are not brittle and hard,  I would put them in warm water to make them more flexible for installation..