Safety Risks of Worn TiresTires can lose their footing long before they're worn out. Our tests show that tread can give up a significant amount of grip when it's still at the halfway point. That's particularly worrisome when you realize how many worn tires are on the roads. A recent study by the National Highway Traffic Safety Administration found that nearly 50 percent of the 11,500 cars, pickup trucks, vans, and sport-utility vehicles the agency checked had at least one tire with half-worn tread. Another 10 percent had at least one bald tire.Worn tires—especially bald ones—can be deadly on wet roads, where the grooves aren't deep enough to channel water out from beneath the tread. The result is hydroplaning, where the tread skims the water's surface and the vehicle no longer responds to the steering wheel. Wet-weather braking and snow traction also decrease as tires wear.
Measurements are in U.S. Imperial will need to be converted to Metric.
