Integy tires are designed for off-road applications with strong climbing type thread made with a soft rubber compound. wide profile design, fit other 40 size wheels/tires, tough, lightweight, for use with race inspired 23mm HD wheel hexes, wheels have super shinny and smooth surface finishing. Super strong design allows you to interchange your tires easily, included tires use proven tread pattern with tons of forward bit, tires are molded with high traction rubber material, comes with light weight foam insert, great cornering consistency.