Shaftuner

We match your driver to your favorite club

 Driver Heads, unlike iron heads, have been improved quite a bit since metal heads were introduced several decades ago. The progression from wood to stainless steel to titanium allowed a doubling of head size and an increase in the coefficient of restitution (COR ) values and moment of inertia (MOI) and increasing the size of the sweet spot.  The current driver COR limit of 0.83, currently imposed by the USGA, was developed from 1996 to 2004, and then finally adopted in 2008. Since then, all clubs in the bag had to conform to the same limit.  The chart below compares smash factor measurements made with many players of  differing handicaps hitting shots with 14 head models sold in the US  from 1985 to 2017. Since smash factor is proportional to COR., it is easier to measure,  and lends itself to live player testing, this method of comparison of driver head models was chosen as the chart below exhibits.


Example of pesent driver head waiting to be re-shafted

      If your driver head is less than 10 years old, it is probably right up against the USGA design limits of size, COR and MOI. The USGA is not likely to change the driver head design rules, so don’t expect very much improvement in the near future. (The head with the highest COR, shown in the chart above, introduced in 2003, doesn’t conform to USGA rules).

  The above chart shows that driver heads have not really improved, from the time that titanium was in introduced around 1998, to the present. If your driver is less than 10 years old and features removable shafts, send only your favorite club to us with a description of your driver model, the distance o 10 hits with it, and we will mail you a new shaft along with your favorite with a 30 day money back guarantee.

   Why not re-shaft your present driver by matching it to your favorite fairway wood, hybrid or iron and save yourself a lot of money. Let your playing partners spend their’s chasing the newest driver models that will never play as well as their favorite club.