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.
Rubber Racketeers due to the war, Gilin goes into business stealing and re-selling good tires, then sells tires retreaded with cheap synthetic rubber to used-car lots. One of Gilin's retreads blows out and causes the death of Mary's brother. Bill and his co-workers become determined to find the culprit behind the shoddy tires. Gilin worries that his scheme will be discovered after Bill traces a tire to his lot. Nikki is pressured by Gilin to accept a date with Bill, but pretends not to be able to reach him, then secretly warns Mary of Gilin's intentions. However, Bill goes to see Nikki,