Know The Line
The Rulebook
Every limit, with the tolerance that actually decides whether a club fails.
You can't get away with anything until you know what "anything" is. Each page takes one limit, gives you the written figure *and* the measurement tolerance — 239µs and 257µs, 460cm³ and 470cm³ — because the second number is the one that busts a club, and almost nobody bothers to quote it.
- 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.
- 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.
- 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.