This is a pair of Duratrax 3.8" Six Pack MT Tires mounted to 6-Spoke Wheels with a 17mm Hex. Duratrax 3.8" diameter Monster Truck tires are available unmounted, or mounted on your choice of black or chrome rims. All are sold in pairs and include foam inserts. All 3.8 MT tires are molded in Sport Compound.