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 Tire and Rubber Company replacement market. In 1988, the company was sold to the Japanese Bridgestone Corporation. Firestone was originally based in Akron, Ohio, also the hometown of its archrival, Goodyear, and two other midsized competitors, General Tire and Rubber and BFGoodrich. Founded on August 3, 1900, the company initiated operations with 12 employees. Together, Firestone and Goodyear were the largest suppliers of automotive tires in North America for over 75 years. In 1906, Henry Ford chose Firestone to supply tires for its car models. In 1918, Firestone Tire and Rubber Company of Canada was incorporated in Hamilton, Ontario, and the first Canadian-made tire