The Ai-DUAL 1/2-BALL CRUISER putter is a version of the Ai-DUAL 1/2-BALL putter with a longer shaft and a longer grip. Its most distinctive feature is the half-ball alignment mark drawn
on the front of the head. The semicircular design, with a straight front and a curved rear, makes it easy to sense any misalignment between the face and the ball when positioned more than perfectly circular. By aligning the ball with the center alignment line, more accurate setup is possible. A pilot study was conducted by golf clubs at two American universities, involving a total of 52 participants and 1,060 putts. The results were very positive, with improvements in face orientation at address and more consistent putting direction. Furthermore, the putter achieved 1.13 out of 10 successful putts from approximately 2 meters compared to conventional putters.
Two Types of Resin: Soft on the Side That Hits the Ball, Hard on the Inside
The face is equipped with the AI-DUAL insert, which was perfected after approximately 15,000 simulations and the creation of 72 different prototypes. Unlike the Ai-ONE and Ai-ONE Titanium inserts, the AI-DUAL insert is made entirely of resin, with a soft resin on the side that hits the ball and a hard resin on the inside.
The Ai-DUAL insert, which not only stabilizes ball speed but also generates more forward spin,
features a complex, winding shape at the interface between the two resin layers, similar to the underside of the Ai-ONE insert. This design was developed by AI with a focus on not only maintaining the same performance as the Ai-ONE insert, which stabilizes ball speed regardless of impact, but also on the spin imparted to the ball. Generally, due to the gear effect, a ball tends to spin forward when it hits the upper part of the face, and backspin when it hits the lower part. Naturally, this also affects the ball’s rolling distance. The Ai-DUAL insert is designed to consistently impart forward spin (clockwise rotation) regardless of whether it’s hit on the upper or lower part of the face. Furthermore, because the bottom of the insert is flush with the sole, the distinctive shape between the two resin layers, created by AI, is more visible than the Ai-ONE putter, which has a clear polycarbonate window.
The isosceles triangle-shaped grooves also contribute to the forward spin and excellent roll.
The Ai-DUAL insert also features a new groove, the FRD (Forward Roll Design) groove, which contributes to the excellent roll. Unlike the Ai-ONE insert, the cross section has a unique shape consisting of a series of right-angled triangular depressions. The area where the ball hits the ball is angled 19 degrees from the vertical.
The Ai-DUAL insert offers a feel and sound closer to the White Hot insert
. The Ai-ONE insert was developed to be similar to the White Hot insert, but some users complained that it was “harder” and “higher-pitched” than the White Hot insert, likely due to its resin and aluminum construction. The Ai-DUAL insert is made entirely of resin, so it’s designed to have a softer feel and a lower sound than the Ai-ONE insert. The improved feel is also due in part to the adoption of the FRD grooves mentioned above.
The Ai-DUAL 1/2-BALL CRUISER Putter lineup includes two heads: the #7 DB and the JAILBIRD DB
. The #7 DB features a horn-shaped, double-bent shaft, while the JAILBIRD DB features a black and white striped alignment. These heads are paired with an all-steel STROKE LAB shaft, weighing in at around 140g. As always, it offers low torque and increases the overall moment of inertia of the putter. The putter length is 38 inches. While the standard CRUISER model was only available in right-handed models, the JAILBIRD DB is now available in left-handed models. The Ai-DUAL 1/2-BALL CRUISER Putter is limited in quantity and cannot be customized.
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