Pit Stop USA is The Online Motorsports Superstore! Tire grinding and sanding helps extend the life of used tires by removing a thin, hardened layer of rubber. Heavy duty 7" Milwaukee sander has a 0-6000 adjustable RPM range, to compensate for varying tire hardness, and features a 10 ft. detachable cord. Backing pad and discs are sold separately. Tech Tip: You're grinding too fast if you see blue smoke while grinding. Lower the rpm under the smoke range for best results.We feature Tire Sanders and Tire Grinders at low everyday prices!