Abstract: Method and apparatus for inverting a torroidal article such as a tractor tire, comprising: a base assembly; a first frame assembly pivotably rearwardly attached to the base assembly; a second frame assembly pivotably attached to a forward portion of the first frame assembly; a tire holder attached to the second frame assembly; and grappling means for holding an edge portion of a tire to be inverted relative to the base assembly. The tire holder is rotatable to permit the removal of a rim portion of the tire on the tire holder by a cutting blade fixed on a boom attached to the apparatus. Rotation of the tire holder is actuated by a hydraulic motor, and hydraulic cylinders are used to pivot the first frame assembly and the second frame assembly. The apparatus is made portable, with a minimum of necessary external support systems, such as a hydraulic fluid pump. The article thus produced has a generally cylindrical shape, smoothed by clamping means, making it useful as a feed bunk for livestock.