Golf is hard enough.
The USGA caps your driver face at 239 microseconds of ball contact. You are playing a muni round against three guys who will take your twenty bucks and cannot spell microsecond. Why are you still using legal equipment?
Where to start
Banned Gear
520cc heads, faces built past the COR limit on purpose, a ball the USGA paid $1.375 million to get off the shelves. What each one broke, and whether it survives contact with physics.
Free StrokesLegal Loopholes
Rules that hand you a free drop, fully above board, and your playing partners have no idea. You do not have to be touching the cart path — stance interference is enough.
Know The LineThe Rulebook
Every limit with its tolerance, because the tolerance is the number that actually busts a club. 239µs and 257µs are not the same thing, and almost nobody tells you the second one.
Here's the honest version
Nearly every golfer alive will never post a score that counts for anything. Yet every brand markets like you're two weeks from Q-School, and builds to a rulebook written for people whose job is golf.
It's not your job. So here's the part nobody says out loud: non-conforming gear is completely lawful to buy and own, and in a social game with your buddies — by agreement — it's absolutely fine. Nobody is running a pendulum test on the 4th tee.
What we won't do is fudge where the line sits, because the real version is better anyway. Any round played under the Rules — including a friendly one you post for handicap — is a round where non-conforming gear doesn't conform. Club championship? Leave it in the garage. Saturday game? Send it.
And we'll show our work. Every limit on this site comes with its tolerance and a link to the governing body's own page, because "your driver is illegal" is a lot more fun when you can prove it. More on how this works →
Latest
- The Ball Rollback Got Paused. Relax.Nothing changes before January 2030, and the whole approach is being reconsidered after the Tours pushed back. Your golf balls are fine. Here is the actual state of play.
- The 460cc Limit, and the 10cc Nobody MentionsDriver heads cap at 460cm³ plus a 10cm³ tolerance. And a head marked above 460 is non-conforming no matter what it measures, which is why 520cc drivers are openly illegal.
- Slope: The Button You're Not Supposed to PressSlope rangefinders are lawful to own and the device itself is permitted. Pressing slope in a round played under the Rules breaks Rule 4.3 — not just in competition.
- Free Relief: The Free Drop You Keep Not TakingYou do not have to be touching the cart path — interference with your stance or swing is enough. And once you have dropped, a second condition can earn you another one.
- Polara Self-Correcting Balls: The Ball That Won't SliceAsymmetrical dimples, a claimed 75% less hook and slice, and a lawsuit that cost the USGA over a million dollars. Banned for breaking spherical symmetry. We have not tested it.
- 48 Inches. Unless You're Good, Then 46.The Rules cap clubs at 48 inches. Model Local Rule G-10 cuts it to 46 for elite play — and almost nobody explains which one applies to you, or how length is measured.
- Hot Faces: How a Driver Gets Itself BannedThe driver face limit is 239 microseconds, with an 18µs test tolerance — so 257µs is where a club actually fails. Here is what that means and how faces cross it.