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.
United States Rubber Company brands. In 1940, U.S. Rubber purchased the remainder of the Gillette Safety Tire Company, and began to expand and modernize the Eau Claire factory, greatly increasing production. During World War II, U.S. Rubber factories were devoted to production of war goods, and produced military truck and airplane tires, as well as the canvas-top, rubber-soled Jungle boot for soldiers and marines serving in tropical and jungle environments. U.S. Rubber ranked 37th among United States corporations in the value of wartime production contracts. In 1942, the United States government restricted the sale of scarce rubber products for civilian use and production at