TIRE TREAD WITH GROOVE HAVING A GROOVE PROJECTION WITH BUMPER

A tire tread is provided that has first and second ribs () with first and second rib sidewalls (). The first rib sidewall and second rib sidewall define a circumferential groove (). A groove projection () is located within the circumferential groove (), and the groove projection extends for a greater distance in the thickness direction than in the lateral direction. A bumper () is present that extends from the groove projection (), and the groove projection () extends for a greater distance in the thickness direction than does the bumper ().