Patent ID: 8651152

Claim:
A tread band for bonding to a bonding surface of a tire being retreaded, the tread band comprising: a primary groove having a top opening that is open to a ground contacting front face of the tread band and a secondary groove having a bottom opening that is open to a back face of the tread band, wherein the groove top of the secondary groove is higher than a groove bottom of the primary groove so that the secondary groove top is opened to the ground contacting front face of the tread band prior to disappearance by wear of the primary groove; and an overflow reservoir having a reservoir opening that is open to the back face of the tread band, the reservoir opening being positioned adjacent to an edge of the secondary groove bottom opening, wherein the overflow reservoir has a depth extending into the tread from the overflow reservoir opening to a top of the overflow reservoir within the tread, the depth of the overflow reservoir extending into the tread thickness beyond the edge of the secondary groove bottom opening.