Scale model of michel X-crane AT tire.
Its drawn as 125mm dia. and about 38mm width (42 with the curve in the side and the details).
Nice looking scale tire, suitable for using as a positiv mold so you can make your own tires. The rims are in my shop as well. But advise to just download that drawing so you could make your own with a lathe out of aluminium. Im not sure the materials in here are strong enough for a model crane or other model vehicles.