Here I have created a 3D CAD Model of the classic BMW - Z4 piece split rims. This was a personal project that was completed my brochure and to help keep my Alias Automotive skills up to scratch. The model was created using just images of the wheels as reference- there were no dimensions/engineering drawings available.

The diameter of the brake disc in total is 0.19 m. Use scale (in Alias Automotive and Showcase or your render program) to adjust it to your liking.