This is the Rear Slick Tire for the DuraTrax 1/5 scale DX450 Brushless On/Off-Road Motorcycle RTR. FEATURES: Rubber construction Black in color INCLUDES: One Rear Slick Tire REQUIRES: Installation on the wheel SPECS: Outer Diameter: 130mm (5") Inner Diameter: 128mm (5") Thickness: 16mm (0.63") cnh 6/16/10 ir/jxs