Golf Professional subscribers get access to a larger set of data and individual profiles of all the shaft model weights and stiffness variations that were made available. If you are a golf professional and would like access to more data there are two choices. Several golf shaft companies now use the EI measuring instrument I designed and manufactured. The magnitude of that accomplishment did not occur to me until a golf shaft company owner said it to me. It took years to understand shaft measurement and many more years to accumulate a meaningful database of shaft measurements. It is one of many videos about golf equipment technology and golf club building on my youtube channel, Devoted Golfer. This video is a detailed discussion about golf shafts stiffness and the history of how they were measured and marketed. You will notice, this site is does not run ads, that allows me to remain unbiased in the articles. Your subscription underwrites the time and resources needed to keep my journal going and growing. Testing shafts and writing articles takes a great amount of time. If you believe as I do, that your golf shafts are essential to good golf, please subscribe. To insure my integrity, there are not ads on this site. This journal is entirely supported by reader subscriptions. And ultimately, help you make better decisions about your golf clubs. My objective in creating this journal is to balance the marketing messages of the golf business with some science. If you are new to my journal, the TECHNOLOGY MENU is a collection of articles that will help you understanding golf shaft design and the attributes of the golf shaft that can be independently measured. This journal provides you with uniform measurements of thousands of golf shafts. It took a few years to refine my EI Instrument and many, many years to acquire and measure the popular golf shafts. But the information, for fear of giving that information to their competitors, is not shared with golfers or golf professionals. There is a great deal to understand beyond the marketing mythology used to promote golf shafts.Ĭreating a uniform system to define the distribution of flex down a golf shaft was possible, in fact many shaft companies have such systems. Learn which profiles work for you and which do not. I encourage you share your comments about what you experience with the shafts reviewed. Here you can learn why some shafts work for you and others do not. If you want to understand golf shafts you have come to the right place. Golf Shaft Reviews is my freelance journal about golf shafts. The term EI profile, is now part of the discussion shaft companies are having with golfers. I have been writing about EI profiles on this journal for 10+ years. It is now owned and used by several shaft companies. Then I designed and manufactured a simple but very accurate EI measuring instrument. I was fortunate to have the opportunity to tour a shaft company R&D lab and my understanding of golf shaft technology was shaken to the core. I learned the terms EI and GJ in discussions with shaft engineers. Shaft engineers and designers define golf shaft stiffness as a profile, the shape of stiffness down the length of the shaft. My fitting business, Fit2Score is based on golf science not golf mythology. These terms developed into a mythological language for describing golf shafts. Shaft company marketing staff developed terms, “kick point”, “stiffness”, “launch” and “spin” to describe shaft properties. So as the saying goes, necessity is the mother of invention. Describing golf shaft properties is not a simple task. That was and still is a problem for understanding what shaft is best for your game. There was no standard rating system for golf shaft stiffness. When I entered the golf club fitting business about 15 years ago, there wasn’t any way to compare golf shafts.
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