Patent ID: 8267134

Claim:
A tread for a retread tire comprising: a tread body having a tread side adapted for engaging a ground surface and a sole side adapted for bonding with a tire carcass; and a plurality of tread element voids formed in the sole side of the tread body and having at least a first edge and a second edge arranged on opposing sides of each tread element void of the plurality of tread element voids, each edge being located at an interface between the tread element void and a surface of the sole side of the tread; wherein at least one of the first edge and the second edge is a break edge, the break edge forming a corner between intersecting surfaces of the sole side and the tread element void, wherein each surface terminates 0.4 mm or more from the projected intersection point of the surfaces, where the break edge at least in part forms a chamfer.