Customer service Tire maintenance and change Tire age How do tires change after use? How do tires change after use? Over time, the rubber compound in a tire’s tread becomes harder, especially when exposed to heat and sunlight. Was this article useful? By telling us your opinion you help us to develop our service. Yes No 3/6 found this article useful. If you didn't get an answer you can send feedback to our customer support. You might be interested also in... How deep are the groove depths of new and old tires?How can I measure my tires’ tread depth?Where can I dispose of my old tires? View all category's articles