![]() Massive clubheads also create moment of inertia measurements far higher than are allowed by the rules. So a company that wants to make an "illegal driver" will design a clubhead that is 500cc. The Rules of Golf limit driver clubhead volume to 460cc. How? Typically, by making the clubheads larger than the rules allow. They build them to be "illegal," after all. When a driver is intentionally non-conforming: Those off-brand or niche companies that intentionally make and market non-conforming drivers don't bother submitting them to the USGA and R&A.Typically when that happens, the manufacturer will make tweaks to the clubhead design, correct the issue and re-submit the club for approval. A manufacturer can unintentionally exceed the limit on CT, rendering a driver head non-conforming. ![]() This multi-layer, multi-material construction allows for fast ball speed from high launch and low spin. CT, as it is abbreviated, is a measurement of the springiness of the clubface (a measurement of the spring-like effect, in other words). While many golf balls are two-piece units, including a soft core covered by a stickier coating, the Callaway ERC Tour line opts for three layers. i also hit with long drive drivers of 4 degrees and with. ![]() hcp 6.0 player and i have a lot of fun with this driver with an average drive of 382 Yards i am very satisfied. if you cant hit the sweet spot get some training. but you should do that with all drivers and all irons. In this case, the culprit is usually characteristic time. Best driver ever, (9 degrees) It is true that you have to hit the sweet spot. When a driver is unintentionally non-conforming: Occasionally, major golf brands will, in pushing up as close to the limits as possible, unintentionally go over the limits or otherwise fail to meet the equipment requirements that are set forth in the rule book. ![]()
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