About this 3D model

Hi- Here's a collection of four rings with different tire tread designs. Two basically generic treads, and two treads based (loosely) on the 2013 Pirelli intermediate and full wet Formula 1 race treads. The rings all have an inside diameter of .67" and an outside diameter of 1.07" and are all .45" wide. I'll put some pictures up as soon as the rings are done printing. Enjoy!