Dry rot in tires is a common safety hazard that can lead to cracks along the tread and sidewall, rendering tires useless because they cannot be properly inflated. Dry rot in tires is caused by the aging process and breaking down of the rubber and polymer materials, also known as sidewall weathering and sidewall cracking. Dry rot is common in tires exposed to extreme weather conditions, heat, or harmful chemical substances. The following are the main causes of dry rot in tires:

• Exposure to excess sunlight and ultraviolet (UV) rays from sunlight
• Abrasive or corrosive chemicals
• Extremely low or high temperatures
• Low tire pressure
• Storing tires at extremely high temperatures
• Not using the tires due to lengthy storage of a vehicle or the tires themselves
• Storing tires near electric motors, battery chargers, generators, welding equipment, or other ozone-generating sources

Dry rot allows air to escape the tire, making it difficult or even impossible to keep the tire properly inflated. Tires with advanced dry rot must be replaced, as they are much more likely to develop leaks, holes, and blowouts. If you notice signs of dry rot, have your tires evaluated by a tire and wheels professional to determine whether or not your tires are safe to drive with. To prevent dry rot in tires, it is recommended to drive on them regularly, keep them properly inflated, and rotate your tires as the manufacturer recommends. Additionally, tires should be cleaned monthly with a washcloth using water and a mild dish soap, and harmful products and ozone-generating sources should be avoided.