What's Inside a Tire?

Have you ever wondered what's inside a tire? Find out here. 


TREAD: Provides traction and cornering grip

BELTS: Stabilize and strengthen the tread

SIDEWALL: Protects the side of the tire from road and curb damage

BODY PLY: Gives the tire strength and flexibility

BEAD: Assures an air-tight fit with the wheel

INNERLINER: Keeps air inside the tire

Modern tire technology blends a unique mix of chemistry, physics and engineering to give consumers a high degree of comfort, performance, efficiency, reliability and safety. Many tires are custom-designed to meet the stresses and performance needs specified by the maker of a particular model vehicle. Every tire is carefully inspected, and random samples are pulled for additional safety tests. As part of these tests, tires are x-rayed, cut apart and examined, run on test wheels, or road-tested to evaluate handling, mileage and traction performance. If properly cared for, tires can last a long time - usually from 40,000 to 80,000 miles, depending on the application.

Provided by the Rubber Manufacturers Association Guide to Tire Safety