This is a pack of two Pro-Line Pin Point 2.0 SC 2.2"/3.0" Truck Tires, in Z3 compound. Indoor Carpet Off-Road Racing is a growing segment of the racing scene and Pro-Line is ready to take over with the Pin Point SC Tire. The Pin Point has tons of Ultra-Sharp Pins in a unique Sine Wave pattern that grip carpet better than VelcroŽ. Pro-Line engineers developed the Z3 carpet tire rubber compound specifically for the needs of Indoor Carpet racing. Z3 compound delivers grip on a variety of surfaces used indoor, including carpet, wood, cardboard and plastic.