Siping (rubber) wear and extends the life of the tire. Both Bridgestone and Michelin sell snow tires that are siped at the factory, while Saf-Tee Siping and Grooving sells machines that can sipe most standard vehicle tires. Siping can also be done by hand. Siping tires may void the manufacturer's warranty. Claims that extended life is achieved by siping may only apply to certain environments, operating temperatures, and rubber compound builds. Siped soles are a characteristic feature of boat shoes. Siping (rubber) Siping is a process of cutting thin slits across a rubber surface to improve traction in wet or icy conditions.
Firestone Natural Rubber Company Firestone Natural Rubber Company Firestone Natural Rubber Company, LLC is a subsidiary of the Bridgestone Americas, Inc. Headquartered in Nashville, TN, the company operates the largest contiguous rubber plantation in the world in Liberia, which first opened in 1926. During the 1920s, the United States access to rubber was restricted by the European colonial powers (Britain and the Netherlands), which held a monopoly in rubber production. Herbert Hoover, then Secretary of Commerce, considered rubber a vital resource due to its usage for car tires and began working with American rubber companies in order to find a rubber source that was