We'll start from the inside out! Tire beads hold the tire to the rim, or the outer edge of the wheel. They're made of copper, brass, or bronze-plated high tensile steel wires wound into a rubber band. Tire beads prevent the tire from sliding out of place when the wheel rolls.

What Is Secondary Rubber on Tires? The secondary rubber is located under the primary tread of the tires. In other words, they are the sub-tread located under the tire's tread pattern. Usually, the tire secondary rubber does not offer the same traction as it is used to strengthen the tire and its performance.