Annual Probability of Getting a Flat Tire
~7%
Annual probability in US
About 220 million flat tires occur annually in the US (roughly 7% of drivers per year). Road debris and potholes are leading causes.
Approximately 220 million flat tires occur in the United States each year, meaning about 7% of drivers experience a flat tire in any given year. The AAA responds to about 4 million tire-related calls per year, making flat tires one of the most common roadside emergencies.
The most common causes of flat tires include road debris (nails, screws, glass, and other sharp objects, causing about 40% of flats), potholes and road damage (about 20%), valve stem failures (about 15%), tire blowouts from underinflation or wear (about 15%), and curb strikes (about 10%). Underinflated tires are a significant contributing factor: about 28% of cars on the road have at least one significantly underinflated tire.
The automotive industry has been moving away from spare tires (about 30% of new cars no longer come with a spare), instead providing tire inflation kits or run-flat tires. This trend has increased reliance on roadside assistance. AAA estimates that the average cost of roadside tire service is $50-$100 for the service call plus $100-$300 for a new tire if needed. Tire pressure monitoring systems (TPMS), mandated in all new US vehicles since 2007, help prevent underinflation-related flats.
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