ST-Max 230

MOI sits in the low 9,000s — not quite 10K but plenty forgiving. The chassis carries 54g of rear weighting (45.5g internal + 8.5g external/swappable) — Mizuno's most stable driver ever made. Testing measured fairways hit jumping from 58% to 71% vs predecessor. Beta Rich Ti-LFS face (9% stronger than SAT2041) plus the expanded Cortech Chamber maintain ball speeds across off-centre strikes — measured 168mph centre / 163mph toe / 161mph heel. Top-quartile forgiveness for the archetype.

Mid-pack distance. Reviewer testing measured average ball speed just under 145mph and average carry of 243 yards — a little lower than ideal because the brief explicitly prioritises forgiveness for the 2024 model year. The Beta Rich Ti-LFS face and expanded Cortech Chamber boost peripheral ball speeds (2-3mph extra on toe strikes), but the chassis produces the shortest carry and total distance on average within the family. The forgiveness premium costs raw yardage at higher swing speeds.

Engineered for stability rather than shape. 54g rear weighting (fixed internal mass plus a single external swappable weight for swing-weight tuning only — not shape-tuning) eliminates meaningful workability hardware. Built-in slight draw bias. Designed to deliver predictable straight ball flights no matter where you strike it on the face — the family's antithesis of the ST-G workable head. Hosel still offers 4° loft adjustability.

Reviewer testing consistently described impact as a "dense, muted thwack that's surprisingly addictive — not the metallic ping of some modern drivers, nor the dead thud of older composite faces." Independent review noted feel "more subtle than some of the other most forgiving drivers on the market, with no twisting at impact and understated acoustics" — "very stable feel through impact." Premium feel for the game-improvement category, with the new Beta Rich Ti-LFS face and expanded Cortech Chamber preserving Mizuno's forged-iron tactile DNA.

Acoustic profile reads loud enough to confirm power but not so loud as to offend other range users — understated and dense, pairing with the muted feel. Engineers have fine-tuned the acoustics for auditory feedback that resonates confidence with a dense sound, while a high-pitched tone at impact makes players feel like they hit it even better than they did. Tour-correct rather than tinny — premium acoustic profile for a max-forgiveness chassis.

The largest footprint in company history — 460cc head shaped shallower and longer heel to toe for max-MOI presentation at address. The slightly larger footprint reads confidence-inspiring for the target buyer without becoming oversized. Carries Mizuno's clean design language. Industry-panel testers rated the address profile positively.