Genius Wheels are a brand of aftermarket wheels primarily known for being custom-designed for Smart Cars, a niche market due to their unique three-lug bolt pattern. They are designed to be performance-oriented, lightweight, and stylish, available in various finishes and sizes like 15 and 17 inches, with popular models including the Darwin and Newton. While the primary focus is on Smart Cars, some retailers list Genius as a general aftermarket wheel brand available in a wider range of sizes and fitments.