On October 22, 2026, Callaway Golf Korea announced the Odyssey TRTL MAX S2S, a larger variation of the TRTL (“Turtle”) putter family. This is a confirmed South Korean market launch, not evidence of a simultaneous worldwide rollout. Callaway's Korean product listing specifies October 2026 as its release month and provides a detailed technical sheet. The design combines two different routes to putter stability: Square 2 Square balancing intended to reduce unwanted face rotation during the stroke, and high moment of inertia intended to resist twisting on off-centre impact.
What makes this a MAX model?
The TRTL family is recognisable by a hexagonal centre reminiscent of a turtle shell, surrounded by a broad supporting frame. The MAX S2S enlarges and increases the mass of the head compared with the regular TRTL S2S. Lightweight components occupy the centre while more mass sits at the perimeter. Four 10-gram sole weights, two forward and two rearward, provide another 40 grams of strategically positioned mass. The purpose is higher MOI — resistance to the head rotating when the ball is not struck exactly at the centre.
It is worth separating two commonly conflated claims. Higher MOI helps a putter resist twisting during off-centre ball contact. “Zero torque” in the S2S product description refers to the head's balance and tendency to keep its orientation throughout the stroke. Neither mechanism automatically reads a green, selects the correct start line or delivers the correct pace.
The confirmed specifications
The official Callaway Korea listing gives a 375 g head, standard lengths of 33, 34 and 35 inches, 5° loft and 70° lie. The standard STROKE LAB 120 BLACK shaft is installed with a 2° forward lean toward the face and paired with a Reverse Taper 2.0 TRTL Slim grip. These are specifications for the Korean offering; readers should not assume that every market will sell precisely the same configuration.
The putter also uses an Ai-STAR face insert with a firmer urethane front layer backed by aluminium. Callaway says the combination is engineered for more consistent feedback and ball speed. The Dual Track Alignment system provides two broad sight lines across the top to aid setup. Those are identifiable design features, not independent proof that the club makes more putts than competitors. The launch material does not provide controlled third-party test data, meaningful error bars or a measured strokes-gained advantage.
How should golfers evaluate it?
Moving to a larger, heavier head can change the way a golfer senses rhythm. Some players may find the mass stabilising; others may struggle to control pace on fast greens. The 5° loft and shaft lean also matter. The effective loft at impact depends on the position of the hands, dynamic stroke delivery and ball position. A personal fitting is therefore more useful than a slogan about torque.
A sensible comparison would include short putts to a defined start line and repeated long putts intended to finish inside a target zone. Record average miss distance, not just the best putt. Compare the results with the putter already in your bag and, where possible, repeat the exercise on differently paced greens. An impressive static MOI specification cannot replace real-world feedback.
Pricing and timing
Callaway's Korean store lists the TRTL MAX S2S at KRW 495,000 as checked on October 25. The company's market announcement was reported on October 22, 2026, and its product record states a release month of 2026.10. Availability and retail prices outside South Korea have not been established by these sources.
Bottom line: The larger head, perimeter weighting, four sole weights and Square 2 Square balance represent specific engineering decisions, not merely fresh styling. They are designed to improve stability, but any practical benefit depends on the golfer's stroke and should be tested rather than assumed.
Sources: Callaway Golf Korea: official specification and listing; Seoul Shinmun: launch announcement, October 22, 2026.
Image: generic archival photo of putting, not the Odyssey TRTL MAX S2S. Semevent / Wikimedia Commons, CC0 1.0; commercial reuse permitted.
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