Keeping the Tire Inflated Photo courtesy of Interbike KEVLAR® and other materials go into this special tire liner to prevent flats. Ceramic in a tire? Sounds funny, but if it's KEVLAR®, it just may keep you rolling... KEVLAR® ceramic fibers and other proprietary materials go into this patented tire liner to prevent flats on mountain bikes. Not only do they prevent punctures from thorns, glass, and other debris, but they also spread force loads when the tire slams into rocks, preventing pinch flats. So what is KEVLAR®? Kevlar is one of the most important man-made organic fibers ever developed. Because of its unique combination of properties, KEVLAR® is used today in a wide variety of industrial applications. These applications include cut, heat, and bullet / fragment resistant apparel, brake and transmission friction parts, gaskets, ropes and cables, composites, fiber optic cables, circuit board reinforcement, sporting goods, tires, and automotive belts and hoses. Although KEVLAR® was developed in the late 1960s, new applications are still being developed for this "wonder material"! Site related questions or comments? Contact crc@tms.org