More consistency with MOI matched clubs

Moment of Inertia (MOI) is the resistance of an object to being rotated around an axis or fixed point. A clubhead with a high MOI is more 'forgiving' than one with a low MOI - the higher MOI clubhead resists twisting more when the ball is hit off-centre.

But there is another 'MOI' of a club that is important - its 'dynamic balance', which plays a crucial role in your ability to control, synchronise and repeat your swing.

The arms rotate around the spine. However, the golf club itself has a separate rotational axis, which are centred on the wrist joint of the upper hand (the left hand for a right-handed golfer).

At the top of the backswing, the golf shaft forms an angle of roughly 90ยบ with the left forearm, but at impact, the shaft & arm will (or should) be pretty much in a straight line. The point at which that angle starts to straighten out is called the wristcock or club RELEASE, the timing of which is affected by the MOI of the golf club. The more closely the MOIs of the clubs in a set match each other, the easier it will be for a golfer to TIME the release consistently.

The swingweight scale was invented in the 1920s to provide a simple method of matching clubs for 'BALANCE'. Apart from the fact that swing weight is a STATIC measurement (and the golf swing is not), in any swingweight-matched set, different clubs will have DIFFERENT MOIs, for which golfers need to make compensatory swing timing adjustments.

MOI Matching is an emerging system that replaces swingweight in order to get around this problem. When the clubs in a set are matched to a golfer's optimum MOI setting, the swing tempo and the timing of the release become more consistent, which results in a higher percentage of shots hit on-centre and more consistent/efficient squaring of the clubface. When combined with heavier or lighter shafts that are a better match for individual golfer's needs, swingpath faults can also be reduced or even eliminated.

  This club was set-up too light for the player to swing with any consistency, as indicated by the erratic impact pattern ....

Same club, same golfer, but with the head weight adjusted to the optimum setting for this golfer's strength & swing ...

Courtesy of


Unfortunately, because every golfer is different, a single MOI setting will not work equally well for all golfers (and nor does a single swingweight setting, incidentally), so using MOI to match the clubs in mass-produced sets is not feasible. And because of this, unfortunately, you will never hear big brand names singing about MOI matching as their supply chain model cannot provide this level of customization and the effort to identity your optimum setting.

However, provided that time is taken to identify your optimum setting, precise MOI-matching will offer you:

- more consistent swing tempo & timing

- improved ball-striking

- better accuracy, consistency & feel

compared to swingweight matched clubs, regardless of your ability.

At Wiz Golf, In addition to MOI-optimising all the new clubs we fit and build, we offer a retro-matching service for existing clubs.

Get more consistency today. Schedule your fitting session with us at 6570-1876 or