Most truck and auto tires these days are made of rubber and steel.  They start out as a loop, called a bead, that is constructed with a rubber coated cable made from steel.  This is the inner armature that gives the tire the necessary strength to stay firmly affixed to the rim of the wheel.  This inner skeleton also allows the tire to withstand the impact of the machines which mount the tires to the rims. The body of the tire is then constructed by applying layers of various fabrics, the most c [...more]