The present preliminary experimental study was undertaken to delineate the forces and deformations associated with traumatic injuries when a tractor wheel rolls over the thorax of three porcine cadavers. The generalized forces of the wheel rollover are recorded by a sixaxes force-plate, and the chest deformations are measured by the External Peripheral Instrument for Deformation Measurement (EPIDM). If the pig was not properly fixed, it will be "dragged" by the wheel. The vertical forces generated, as measured by the force-plate, appear as a series of spikes. When the pigs are restrained from translation, the chest deformation could range from 40 to 53% of the original. When compared against traumatic contact impact injuries, crush bony injuries appear to be more localized, i.e., bony injuries appear in the neighborhood of the primary site of contact. Furthermore, the maximum deformation occurs shortly after the peak force, which appears 19 independent of the specimen size or rolling ramp configuration.