15" Angled Tread Dirt Hoosier Style Tires with Hoosier Decals (set of 4)Use with PPP-W5 WheelsRecommended Instructions:Be sure to check tire for clearance in the fender wells of the model first. Use sandpaper to lightly roughen the tread. Apply the decals to the face of the tire. The back will have four circles molded into the tires. After the decals have dried, shoot a coat of Dull Cote on the face of the tire and then insert the wheels.