Odyssey Ai-DUAL S2S #7 OS Putter

High MOI Putter

The #7 has been Odyssey's answer for golfers who need help lining up, and the 2026 Ai-DUAL S2S #7 OS takes that idea and makes the head even bigger. OS stands for oversized, and that is exactly what you get: a wide mallet with two long fangs framing the ball and a sightline running straight back through the middle. If you have ever stood over a putt and second-guessed where the face was pointing, this is the shape built to quiet that doubt.

The Ai-DUAL insert is the interesting part. Odyssey used AI to design a face with variable ridges, thicker in some spots and thinner in others, so the ball comes off at a more consistent speed whether you catch it dead center or a little toward the heel or toe. On short putts you probably will not notice. On lag putts from 30 or 40 feet, where a slightly dead strike usually leaves you well short, that consistency is where the head earns its keep.

This is a face-balanced putter, which means the face points at the sky when you balance the shaft on your finger. That points it squarely at golfers with a straight-back, straight-through stroke and very little arc. It also makes this one of the highest-forgiveness putters Odyssey builds. It won't magically fix a stroke that swings hard from the inside, but for a lot of players, it will make the misses roll a lot more like the makes.

Design

The head is a wide mallet with two prongs extending back from the face, and pushing to the OS size moves even more weight to the perimeter for a higher MOI and more stability on off-center hits. The sightline runs from the top edge of the face through the center of the crown, and the gap between the fangs gives you a second reference for squaring up. Under that alignment aid is the Ai-DUAL face insert, tuned by software rather than by feel alone, with a ridge pattern that varies across the face to even out ball speed on mishits. Face-balanced weighting keeps the head stable through a straight stroke, so the whole package is aimed at repeatability rather than shot-making feel.

Who It's For

• You have a straight-back, straight-through stroke with almost no arc, which is what face-balanced weighting rewards.
• Lining up is your weak point and you want the biggest, clearest alignment reference Odyssey makes.
• Your lag putting leaves too many putts short, and a face built to hold ball speed on off-center hits would help.
• You want maximum forgiveness and do not mind a larger, heavier head sitting behind the ball.
• You tend to miss slightly heel or toe and want those putts to roll out closer to your center strikes.

Technology

About Odyssey

Odyssey pioneered insert technology with the original White Hot face, which uses a urethane compound to produce a soft, consistent feel. Their Ai-ONE line uses AI to optimize face patterns for better roll on off-center strikes.

Specifications

Frequently Asked Questions

What does OS mean on the Odyssey Ai-DUAL S2S #7?

OS is oversized. It is a larger version of the standard #7 mallet head, with more weight pushed to the perimeter for a higher MOI. The tradeoff is a bigger footprint behind the ball, which most players who choose this model actually want for alignment and stability.

Is the #7 OS face-balanced or toe-hang?

It is face-balanced. Rest the shaft across your finger and the face points straight up. That setup suits a stroke that moves straight back and straight through. If your stroke has a noticeable inside-to-square arc, a toe-hang putter will usually match your motion better.

What is the Ai-DUAL insert and does it actually help?

It is a face insert with a variable ridge pattern that Odyssey designed using AI to keep ball speed more consistent across the face. In practice, the benefit shows up most on off-center hits and longer putts, where a slightly off strike normally comes up short. It will not add feel to a pured center strike, but it tightens up your distance control on the misses.

Who should not buy this putter?

If you have a strong arc in your stroke, the face-balanced design fights your natural motion. If you prefer a compact blade or a clean look with no alignment lines, the large fanged head and bold sightline will feel like too much. This is a forgiveness-first putter, not a shot-maker's tool.

Does the alignment aid really make a difference on the green?

For golfers who struggle to aim, yes. The sightline through the crown plus the gap between the two fangs gives you two ways to check that the face is square before you pull the trigger. If aiming is already a strength for you, the visual help matters less, but it does not hurt.

More from Odyssey