AP10154-104 Pyramid SC 2.2"/3.0" Z4 (Soft Carpet)  Pyramid SC 2.2"/3.0" Tires (2 pcs) Closed Cell Foam Inserts (2 pcs) Height:   4.28" (109mm) Width:   1.81" (46mm) All-new Ground up Design Specifically for Astro Turf Racing Large Pyramid Shaped Pins Dig into the Astro Turf Surface Knife Edge Pins Pointed Front to Back for Maximum Grip Optimized Carcass Shape for Improved Agility Soft, Re-usable and Water-proof Closed Cell Foam Inserts Included For use with Pro-Line 2.2"/3.0" Wheels Made in the USA, since 1982 - Read about Pro-Line Racing's History