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.
Seiberling Rubber Company belonging to Bridgestone when the latter took over Firestone. Seiberling tires are no longer sold in the US market, but the brand name is still in use in some countries. Manufactured at Firestone's plants, they are aimed to the budget-oriented consumer in selected sizes. Seiberling Rubber Company The Seiberling Rubber Company was an American tire manufacturer for motor vehicles. In 1898 Frank A. Seiberling acquired an old strawboard factory in Akron, Ohio and founded the Goodyear Tire & Rubber Company (naming it after Charles Goodyear, the inventor of vulcanized rubber). He served as the company's president for 15 years when,