Method and apparatus for correcting tire nonuniformity

An apparatus for measuring a tire tread profile and truing said tire comprises

• a base having linear bearing guide rails for directing movement in an X direction parallel to the axis of the tire to be measured and trued;
• a profile measuring device mounted on a movable sled, the sled having linear bearings attached to the guide rail bearings;
• a device for measuring a plurality of radial points in different locations about a circumference of the tire in each of several circumferential planes located between the tread shoulders;
• wherein the circumferential planes correspond to tread lugs;
• calculation means for determining a radial low point from the plurality of radial points in different locations for each circumferential plane and then determining a virtual tread profile from the radial low points
• a truing device assembly mounted on a movable carriage, the carriage having linear bearings attached to the guide rail bearings;
• and
• a tire rotation device.