Goal
TaylorMade engineers worked to make a game-improvement club that returns energy to the ball more efficiently for increased distance and forgiveness on off-center hits.

The Scoop
TaylorMade designers have worked for years to increase distance inirons by making faces that flex more at impact, but that resulted in an unintended consequence. The top area of game-improvement and max game-improvement irons also grew more flexible, which resulted in a loss of energy that could have been redirected back into the shot.

Enter Ribcor, a new technology added to the TaylorMade M4 ironsthat helps deliver more distance than last season’s M2 irons, while also improving sound and feel. Ribcor is a pair of rib-like vertical support pieces housed inside each M4 iron that affix to the sole and the topline, making the whole body of the club stiffer.