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.
Waste tires hefty, thick, and made of multiple materials, scrap tires present distinct challenges in recycling and disposal. In 2007,around 300 million ELTs had been produced in the United States. In 2008 around one billion ELTs were being produced globally each year with an estimated further four billion already in stockpiles and landfills. Global production in 2008 was about 1.5 billion new tires. The U.S. as the largest producer of ELTs alone produced generated 291.8 million tyres in 2009 as estimated by the U.S. Rubber Manufacturers Association. In 2013, of tires were generated in the U.S. Newer figures (2015) talk about 450