Moment of inertia has been the value proposition when it comes to putters. The higher the MOI, so the reasoning goes, the higher a club’s forgiveness. Not only does Cleveland challenge that ideology, it makes the case that higher MOI putters roll the ball farther off line than they should. Cleveland’s response is the Frontline, which puts weight close behind the face—the opposite of where you would put it to maximize MOI. Cleveland says this not only keeps the club square through the stroke but reduces sidespin at impact. An S-shape groove pattern regulates ball speed across the face, and the putters feature Cleveland’s aim line set at 21.35 millimeters above the sole. That matches the midpoint of the ball, making it easier to sense the proper alignment regardless of your eye position at setup. Read more >>