Rhino - GT350R Wheel
When I worked as a designer for a aviation design consultancy, my primary tools were Solidworks for assembly development, and Rhinoceros for concepting and surface modeling. Today, I still like to use Rhino for personal projects and to keep my knowledge fresh.
This a Ford Mustang GT350R wheel and Yokohama Advan A048 tire I modeled to practice surface transitions and interlocking radial patterns. Renders were made in Rhino directly.