these look awesome.
Would not like to turn that gear though! What is that chainring a 70T?
This is a 3d model, a fictional scale model, in the scale of motorcycles 1:12.
therefore, all the details here are not made on the scale of the real world, but taking into account the small scale, the scale model.
so for example, in real scale, the spoke has a diameter of 2-1.8 mm. if you reduce it on a scale of 1:12, you get 0.16mm, this is the thickness of 2 human hairs. such spokes cannot be made in a scale model in real life, so I increase their scale. the same with the chain, chainrings, bolts and other small details.