A refrigerator includes a cabinet defining an interior volume and a door for accessing the interior volume. An ice maker is disposed within the interior volume harvesting ice. The ice maker includes a frame and a motor. An ice tray includes a first end engaged with the motor, a second end engaged to the frame and a plurality ice wells defined by a plurality of weirs including first and second sets of weirs positioned proximate the first and second ends respectively, and interior weirs positioned therebetween. Each of the first and second sets of weirs and the internal weirs include a passage bifurcating each weir into first and second weir portions. Each of the passages defined by the first and second sets of weirs have a cross-sectional area that is greater than a cross-sectional area of any one of the passages defined by the internal weirs.