The most common failure of steel belted radial tires reported is tread separation. This occurs when the tread physically separates from the carcass of the tire. Almost all tires manufactured today are steel belted radial tires.
Tread separation usually occurs when the rubber used to make the tire does not bond or adhere properly to the steel belts. This poor adhesion is often the result of contamination by moisture, rust, sulfur or chemical solvents used to remove excessive sulfur from steel belts that have become stale, or even the use of expired adhesives.
Statistics show that tire tread separations predominantly happen in warm weather states, many in California. Tread separation is extremely dangerous because it changes the dynamics of the vehicle while traveling at highway speeds. When tread separation occurs, vehicles often roll over or drivers lose control, usually resulting in very serious injury or even death.