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!