Tire ash is a raw material used in tire construction. To save money on material costs, some companies use up to 12% tire ash in their tires. High Tire ash content is shown to reduce the longevity and reliability of tires. Tire ash is used in the construction of all tires, but a lower ratio of tire ash to natural rubber results in increased performance and longevity. Taskmaster Components uses a very low tire ash percentage in our tires. Ask your tire provider about the makeup of their tires.