Cleaning the grooves, polishing the face, restoring grip: behind these seemingly simple operations lies a question that matters to every golfer. Can you extend the life of a worn wedge without replacing it? The Korean accessory ADAK promises spectacular gains thanks to a material embedded with diamond microparticles. But the available data, wedge-wear testing and the equipment rules all suggest taking a much closer look at that promise.
Why does a wedge gradually lose spin?
A new wedge has a face designed to produce relatively predictable contact conditions between ball and club. Two elements play a key role in generating spin: the face texture, which contributes to friction, and the grooves, which help channel away moisture and grass that can get trapped between the ball and the metal. Their relative importance depends on the strike conditions. On a clean, dry surface, face friction directly drives spin. With water or grass in play, the grooves’ ability to clear contaminants becomes decisive.
As shots accumulate, groove edges can round off, the face’s micro-texture changes and performance declines. Wear is especially pronounced on clubs used heavily on the range, in bunkers or on sandy turf. It depends far more on the number and type of impacts than on the date printed on the receipt. Two wedges bought on the same day can show very different face conditions after a few seasons, depending on how often and where they have been used.
Wear must, however, be distinguished from dirt. Dried soil in the grooves, grass residue or deposits on the face can reduce contact efficiency without the metal actually being damaged. Thorough cleaning can then restore part of the lost performance. Conversely, once groove edges have been blunted by thousands of impacts, removing debris does not put back the missing metal. That is why an accessory can work well on a dirty club without being a fix for mechanical wear.
Nor is the problem just the rpm figure on a launch monitor. When the ball slides more on the face, launch angle can rise, spin can drop and rollout becomes less predictable. For a golfer trying to stop an approach near the pin, the issue isn’t only a ball that checks up less on the green: it’s that the stopping point becomes harder to predict. Consistency of distance and trajectory matters at least as much as chasing maximum spin.
What testing reveals about wedge wear
Titleist has published results for Vokey wedges at different levels of wear. In this manufacturer test, a new wedge produced 8,500 rpm of spin, with a 33-degree launch angle and 10 feet of rollout after landing. The wedge with wear equivalent to 75 rounds produced 7,400 rpm, 34 degrees of launch and 18 feet of rollout. After wear equivalent to 125 rounds, the figures were 6,500 rpm, 35 degrees and 24 feet of rollout. Under the specific conditions of this test, a 2,000 rpm drop between the new and most-worn club came with more than double the rollout.
These results come from a company that sells new wedges, which calls for some context. They nonetheless show that face condition can affect several performance parameters at once. Vokey’s frequent recommendation to have wedges checked at around 75 rounds should not be read as a universal expiry date. A player who hits long bunker sessions every week does not wear clubs at the same rate as someone who plays twice a month and rarely practises.
A separate set of measurements published by MyGolfSpy adds another perspective. The outlet tracked a 56-degree Vokey SM10, first new, then after simulated wear produced largely through sand shots, which it presents as the equivalent of roughly 75 rounds. On shots from turf to a 50-yard target, average spin dropped from 7,021 to 3,737 rpm after 500 bunker shots — a decline of about 47%. Launch angle rose from 27 to 35 degrees, and carry-distance dispersion increased. The test highlights an often-overlooked point: a worn wedge can become less consistent even when the player’s swing stays the same.
It would be wrong to compare the 2,000 rpm lost in the Titleist test with the 3,284 rpm observed by MyGolfSpy to derive an average wear rate. The protocols, clubs and strike conditions differ. Both investigations do, however, converge on the core finding: a worn face can produce less spin, launch higher and make approach shots harder to control. That is precisely the performance loss restoration accessories claim to fix.
ADAK: diamond microparticles for groove maintenance
Developed by South Korean company Nextzhen, ADAK is based on a material described as an elastomer embedded with diamond microparticles. The company cites industrial experience in precision polishing, notably for smartphone screens. The idea is to transfer that technology to club-face care: a material abrasive enough to remove certain deposits and act on the metal surface, yet flexible enough to follow the grooves without damaging them the way a misused metal tool might.
That sets the product apart from a standard brush. A soft brush mainly removes dirt; ADAK claims an additional polishing and groove-sharpening action. The distinction matters, because the two operations have different implications. Removing oxidation or residue is maintenance. Altering groove edges or face roughness is potentially an intervention on the club’s physical characteristics. The manufacturer’s marketing bundles both benefits, when they should be assessed separately.
According to ADAK’s own figures, spin rises from 5,014 to 8,858 rpm after treatment — an increase of 3,844 rpm. That roughly 77% gain is the manufacturer’s headline claim.
GolfWRX’s initial write-up of the product also cited robot testing by KIGOS, described by the site as Korea’s leading golf equipment research organisation, reporting a gain of about 3,800 rpm, 2% more ball speed, 1.2 metres (about 4 feet) of extra distance and improved accuracy. Nextzhen’s December 2025 press release presents this testing as independent validation. But involving an outside body is not the same as publishing a complete scientific protocol. A result announced in a press release or repeated in a product feature does not, on its own, allow anyone to verify the measurement conditions, the quality of the comparisons or the reproducibility of the results.
Does the 3,800 rpm figure hold up?
To interpret a spin gain properly, several pieces of information missing from the public material would be needed: the wedge model and its initial condition, the number of shots, clubhead speed, ball type, turf conditions, moisture, any prior cleaning, and the dispersion of the measurements. We would also need to know whether the 5,014 rpm baseline reflects a simply dirty club, worn grooves, an oxidised face or a combination. Without that, the gain cannot be attributed specifically to groove restoration.
A particularly informative protocol would compare four states of the same wedge model: a dirty face before maintenance, the same face after traditional cleaning with water and a brush, the face after ADAK treatment, and a new wedge as a reference. Shots would be hit with the same balls under controlled conditions, with comparable clubhead speeds and impact locations. This setup would show whether ADAK delivers more than a simple clean, and by how much. Above all, it would avoid crediting a polishing technology with a gain that may come mainly from removing dirt.
The other question is durability. An immediate gain after treatment does not prove the face will stay stable over dozens of rounds. If the accessory removes a tiny amount of material, the effect of repeated use on groove edges and the hitting area needs to be checked. Conversely, if it removes virtually no metal, it needs explaining how it could actually restore a blunted edge. This apparent contradiction — a cleaner described as gentle, a sharpener described as effective — calls for surface measurements before and after use.
As things stand, ADAK’s numbers are a marketing claim backed by testing presented as external, not sufficient proof of a universal gain of nearly 4,000 rpm. That doesn’t mean the product doesn’t work. It means its real advantage over conventional cleaning has yet to be publicly quantified under comparable conditions.
Can you sharpen your grooves without making your wedge non-conforming?
This is probably the trickiest part of the story. The R&A and USGA equipment rules govern groove geometry, face roughness and other characteristics that can influence spin. They don’t only apply at the point of purchase. When a wedge is deliberately modified, it must still meet the applicable specifications. The governing bodies also distinguish normal wear, which does not make an originally conforming club non-conforming, from intentional modification of its characteristics.
The R&A further states that a player may not deliberately change a club’s performance characteristics during a round and then make a stroke with it. Cleaning remains permitted, but the operation changes nature when it involves physically altering groove edges or face texture to improve contact with the ball. That distinction matters for ADAK, since the manufacturer markets it as both a cleaner and a sharpening tool.
What counts, then, is not the product’s name or even the presence of abrasive particles, but its measurable effect on face geometry and roughness. No published, verifiable measurement of grooves before and after treatment shows that ADAK makes a wedge non-conforming; equally, nothing guarantees it keeps every club conforming, regardless of initial wear and how often the product is used. USGA documentation explicitly covers grooves deliberately altered by filing or re-grooving tools: these must be properly evaluated. For a golfer who plays competitively, the stakes call for more than a marketing promise.
The question to put to ADAK is therefore precise: does the manufacturer have a conformance evaluation of wedges after treatment, and not just spin measurements? A positive robot result is not a regulatory certification. Until that distinction is documented, ADAK is best regarded as an accessory whose exact effects on groove geometry and conformance remain to be established.
Clean, restore or replace: what should golfers do?
The first answer is also the cheapest: clean your wedges regularly. A suitable brush, water and a towel remove most of the residue that builds up on the face. The goal isn’t cosmetic perfection but consistent contact conditions. For a recent wedge that is simply dirty, the public data reviewed here offers no convincing evidence that an abrasive treatment consistently beats traditional cleaning.
For an older wedge, the decision should be based on performance rather than appearance. A scuffed face or worn finish doesn’t necessarily mean the grooves have lost their effectiveness. Conversely, a club that looks clean may have significant wear in the hitting area. The best diagnosis is to compare trajectory, spin, launch angle and distance consistency, under identical conditions, with a new wedge of similar specifications. The result should be judged against how the club is actually used: approaches from 40 to 75 yards, bunker shots, short shots around the green and the lies you typically face.
Replacement makes more sense once the loss of control is significant enough to change decisions on the course. A wedge that consistently launches higher, rolls out further and produces erratic distances can cost shots, even if the player has adapted to it. The Titleist and MyGolfSpy tests show the decline can be substantial, but they don’t support a one-size-fits-all replacement schedule. A dedicated short-game player and an occasional golfer have neither the same wear nor the same demands.
That leaves the idea of an accessory that meaningfully extends a club’s life. It’s an appealing one, especially given what a new wedge costs. But ADAK’s economic case depends on two results that have yet to be demonstrated comparatively: the extra gain over conventional cleaning, and how long it lasts. Without that data, there’s no serious way to calculate how many extra rounds a golfer might get before replacing a wedge.
The real issue: predictable control, not record spin
The golf industry has got into the habit of judging wedges by how much spin they produce. That view is incomplete. A ball spinning at 9,000 rpm is not necessarily better played than one spinning at 7,000 rpm if its trajectory, distance and stopping point don’t match the intended shot. Spin is one control parameter among others, and its value depends on dynamic loft, speed, ball type, strike quality and turf conditions.
ADAK raises a legitimate question: can you extend a wedge’s life without sacrificing performance? The available data doesn’t yet allow a positive answer for this product. It does show that face wear can seriously degrade approach control, and that cleaning should not be confused with mechanical restoration. Before promising thousands of extra rpm, ADAK still needs to show what it really adds over a simple brush, how long that advantage lasts and whether the club remains conforming. Three questions an independent test could answer.
Sources and references
- ADAK Golf — official presentation of the cleaner and sharpener. Description of the diamond elastomer and claimed spin values: 5,014 and 8,858 rpm. ADAK official website
- GolfWRX — “Korean Gadget Report: How ADAK’s diamonds are redefining the wedge game”, July 2025. Presentation of Nextzhen, the industrial process and results attributed to KIGOS testing. GolfWRX article
- Nextzhen / PRNewswire — press release, December 2025. Manufacturer claims on the technology, commercial development and performance validation. Nextzhen press release
- Titleist / Vokey — “How Do I Inspect My Wedges for Groove Wear and Spin Loss?”, June 2024. Performance comparison of a new wedge and wedges with wear equivalent to 75 and 125 rounds. Titleist study
- MyGolfSpy — “Stop Using Worn Wedges: We Show You The Exact Spin Loss After 75 Rounds”, 2025. Comparative spin and launch measurements after simulated wear. MyGolfSpy test
- R&A / USGA — Equipment Rules, Part 2: Conformance of Clubs. Official specifications for face, roughness and grooves. Equipment Rules
- The R&A — Rule 4: The Player’s Equipment. Provisions on deliberate changes to performance characteristics and cleaning clubs. Rule 4 (switch the page to English)
- USGA — “Irregular or Unusual Grooves”. Technical guidance on worn and deliberately altered grooves. USGA technical documentation
Editor’s note: ADAK figures are those claimed by the manufacturer or reported in its media coverage. The full KIGOS report could not be obtained to audit the protocol. Titleist data comes from manufacturer testing; MyGolfSpy data comes from a separate protocol. MyGolfMedia did not physically test ADAK for this article.