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         Tire: hollow, elastic casing enclosing 
          an air-filled cavity. 
          Tread pattern: raised designs on the surfaces of a tire. 
          Side wall: side of the tire. 
          Radical body cords: arched frame of the tire. 
          Special high stiffness apex: filling material. 
          Bead wire: wire moulding a tire. 
          Belt: layers of different thicknesses that cover the frame of 
          the tire. 
          Tread design: part of the tire that comes into contact with the 
          road. 
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