GOLF, CURL & MORE

726 Dundas St., Woodstock, Ontario, Canada. N4S 1E7. 519-537-7496, 1-866-286-2875, rbmck@oxford.net

SQUARE DRIVERS....NOT NEEDED

New Revelations on Driver Head MOI

In case you haven’t heard, the whole reason you’re about to see the new “square shape" drivers hit the market in 2007 is the big companies’ effort to offer standard drivers which have a higher Moment of Inertia, specifically the MOI, that dictates how much resistance the head will have when impact occurs anywhere on the toe or heel side of the face. We have the ability to custom build drivers in which the head has a higher MOI than any of the new OEM square drivers.

You’re well aware by now that the stock drivers of all the major brand name companies make and ship to their retailers are between 45" and 46" in length. This is the standard length range for all the big brand name companies’ men’s drivers which are sold off the rack to millions of golfers every year. As a club maker who works in the world of swing weight and/or MOI of the assembled club, we are aware of how much the OEMs driver heads have to weigh to be able to end up with a D0-D2 swing weight with their 65-75 gram graphite shafts. This being the standard make up of a “Off the Rack” driver. That’s right; somewhere between 188 and 198 grams is what the head weight has to be for today’s OEM brand name driver heads.

The MOI of a club head as measured about the vertical axis through the center of gravity is now limited under the rules of golf, to a maximum of 5,600 g-cm2 with an additional tolerance of 100 g-cm2. This means any driver with an MOI of 5,700 g-cm2 or lower is OK with the USGA

First a word on g-cm2, the USGA ordained form of measurement of the MOI. In simple terms, two things cause the MOI to increase or decrease. First one’s easy. The heavier the club head, the higher the MOI. For proof, look at the array of high MOI “branding iron style" putter heads that have come on the market in the past 3-4 years, all trying to achieve a higher MOI than the one before. There are putter heads in the industry today which have an MOI in excess of 10,000 g-cm2! Why are the big companies only able to achieve an MOI in a driver head of 5,000 to 5,250 g-cm2? The main reason is the weight of the head. Putter heads with an MOI over 10,000 g-cm2 weigh well over 400 grams. Driver heads, as we just mentioned, weigh between 188 and 198g. At least the heads on the OEM standard made drivers do. Most of the driver heads on the custom fit drivers we build weigh, more than that.

Why? Because we build far, far more drivers at lengths shorter than the OEMs’ standard range of 45-46" than they do at those OEM standard lengths. We are convinced that perhaps 80% of all male golfers currently using a 45-46" driver would hit the ball farther, straighter and more consistently on center if they were properly custom fit into a driver that is at least an inch or more shorter than the OEMs standard driver. We have a lot of golfers who enjoy the game more now because of just that – a shorter driver that is properly swing weighted or MOI’d for that golfer’s ability.

Here’s how we build drivers with a higher head MOI than any of the big companies will offer this year. The head weight of a driver built in a range from 43.5 to 44" with the same 65-76g graphite shaft, and 50 gram grip to a swing weight of D1 will be 205 to 212 grams. From recent studies, the average increase of the MOI for the average 460cc driver today when ONE GRAM is added to the head weight is 35 g-cm2. That means if you fit a golfer into a driver that is 44" in length with a driver head that has a starting MOI of 4800 g-cm2, that same head will have an MOI of 5,220 g-cm2 when we finish building it to a D1 swing weight. If you built it 43.5" in length, which many, many golfers need, to really improve their driving consistency, the driver head’s MOI would be 5,430 g-cm2.

We have always had an advantage, because we have the ability to custom fit golfers with the best specifications that will allow each different golfer to get the most from their size, strength, athletic ability and swing characteristics. The only difference with this little revelation about driver head MOI is that we now have a NUMBER to put in front of golfers to PROVE that we can make a better golf club than they can buy “Off the Rack.”

Wishon 919THI Driver

+5,000 g-cm2 MOI Drivers Designed with a

Non-Radical Shape

SHAFT:

CALL FOR MORE INFO OR GO TO: Wishon 919THI

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Golf, Curl & More, 726 Dundas St. Woodstock, Ontario, Canada, N4S 1E7 1-866-286-2875, 519-537-7496 Fax: 519-537-8050, www.golfcurlandmore.com rbmck@oxford.net